Academic literature on the topic 'Sundaland'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Sundaland.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Sundaland"
1
Sarr, A. C., L. Husson, P. Sepulchre, A.-M. Pastier, K. Pedoja, M. Elliot, C. Arias-Ruiz, T. Solihuddin, S. Aribowo, and Susilohadi. "Subsiding Sundaland." Geology 47, no. 2 (January 4, 2019): 119–22. http://dx.doi.org/10.1130/g45629.1.
Full text
2
Parham, Peter R. "Subsiding Sundaland: COMMENT." Geology 47, no. 7 (July 1, 2019): e469-e469. http://dx.doi.org/10.1130/g46294c.1.
Full text
3
Sarr, A. C., L. Husson, P. Sepulchre, A.-M. Pastier, K. Pedoja, M. Elliot, C. Arias-Ruiz, T. Solihuddin, S. Aribowo, and Susilohadi. "Subsiding Sundaland: REPLY." Geology 47, no. 7 (July 1, 2019): e470-e470. http://dx.doi.org/10.1130/g46493y.1.
Full text
4
Metcalfe, Ian. "Tectonic evolution of Sundaland." Bulletin of the Geological Society of Malaysia 63 (June 1, 2017): 27–60. http://dx.doi.org/10.7186/bgsm63201702.
Full text
5
Grismer, L. Lee, Nikolay A. Poyarkov, Evan S. H. Quah, Jesse L. Grismer, and Perry L. Wood Jr. "The biogeography of bent-toed geckos, Cyrtodactylus (Squamata: Gekkonidae)." PeerJ 10 (March 22, 2022): e13153. http://dx.doi.org/10.7717/peerj.13153.
Full textAbstract:
The gekkonid genus Cyrtodactylus is the third largest vertebrate genus on the planet with well over 300 species that range across at least eight biogeographic regions from South Asia to Melanesia. The ecological and morphological plasticity within the genus, has contributed to its ability to disperse across ephemeral seaways, river systems, basins, land bridges, and mountain ranges—followed by in situ diversification within specific geographic areas. Ancestral ranges were reconstructed on a mitochondrial phylogeny with 346 described and undescribed species from which it was inferred that Cyrtodactylus evolved in a proto-Himalaya region during the early Eocene. From there, it dispersed to what is currently Indoburma and Indochina during the mid-Eocene—the latter becoming the first major center of origin for the remainder of the genus that seeded dispersals to the Indian subcontinent, Papua, and Sundaland. Sundaland became a second major center of radiation during the Oligocene and gave rise to a large number of species that radiated further within Sundaland and dispersed to Wallacea, the Philippines, and back to Indochina. One Papuan lineage dispersed west to recolonize and radiate in Sundaland. Currently, Indochina and Sundaland still harbor the vast majority of species of Cyrtodactylus.
6
Nisa, Nisfia Rakhmatun, Berry Juliandi, Rika Raffiudin, Jauharlina Jauharlina, Mahardika Gama Pradana, Araz Meilin, Jasmi Jasmi, et al. "Intra- and Interspecies Wing Venation Variations of Apis cerana and Apis nigrocincta Species in Indonesia." HAYATI Journal of Biosciences 29, no. 2 (January 26, 2022): 222–33. http://dx.doi.org/10.4308/hjb.29.2.222-233.
Full textAbstract:
Apis cerana has a wide distribution in Asia, including Sundaland, and is currently found in Wallacea, while the sister species, A. nigrocincta, is native in Sulawesi. The wide geographic distribution and the island isolation led to form morphological differences in the bees. The morph and wing venations are known to have a high genetic inheritance. Therefore, this research aimed to (1) analyze the landmark variation of wing venations of A. cerana from Sundaland and Wallacea, and A. nigrocincta from Sulawesi, (2) determine the relationship between these two bee species. The research was conducted by digitizing 550 wing venations based on nineteen landmarks. Our study on intraspecies showed that A. cerana Sumatra revealed a high variation in bending energy. Overall, the deformation grid of A. cerana from Sundaland has higher displacement than those from Wallacea, meaning higher variations of the Sundaland A. cerana. We found geometric morphometric markers of landmarks 16 and 17 in intraspecies and interspecies bees. Thus, these landmarks known as a cubital index can be used for species identification. The differentiation of interspecies has been shown in the PCA. Apis nigrocincta was separated from the single group of the centroid A. cerana and was supported by the Neighbor-Joining tree.
7
Hasan, F., D. T. Jones, S. Syaukani, and P. Eggleton. "Termite transects from Buton Island, Sulawesi, have a low diversity compared with Sundaland sites." Journal of Tropical Ecology 37, no. 4 (July 2021): 161–64. http://dx.doi.org/10.1017/s0266467421000146.
Full textAbstract:
AbstractWe used a standardised transect method to compare lowland forest termite assemblages in Buton Island, Sulawesi, with transects in Sundaland. The four Buton transects were extremely depauperate with species density ranging from 1 to 6 species, which is around 10% of the species density in 11 described Sundaland transects. Soil-feeding species were absent from the Buton transects but represent some 43% of species in the Sundaland transects. The Buton transects have relatively high soil pH (6.7–7.9), which may be associated with depauperate termite assemblages. Most termite genera recorded in Sulawesi are wood nesters that can raft in floating wood, which is probably how they arrived in Sulawesi. The Macrotermitinae (fungus-growers) do not raft and probably flew across serendipitously. Geographic isolation, both on Buton and in Sulawesi more generally, and Buton’s underlying geology causing high soil pH, may account for the near-absence of soil-nesters and soil-feeders, none of which are known to raft.
8
Kurniawan, Nia, Driyana Rike Ahmadlia, Day Shine Nahari, and Anggun Sausan Firdaus. "Speciation and zoogeography of amphibian in Sundaland." Berkala Penelitian Hayati 21, no. 1 (December 31, 2015): 1–7. http://dx.doi.org/10.23869/bphjbr.21.1.20151.
Full text
9
Kamaludin, A. H., W. A. Wan Aris, T. A. Musa, A. H. Omar, and A. Z. Sha’ameri. "PERFORMANCE OF SITE VELOCITY PREDICTION IN SUNDALAND." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVI-4/W3-2021 (January 10, 2022): 155–60. http://dx.doi.org/10.5194/isprs-archives-xlvi-4-w3-2021-155-2022.
Full textAbstract:
Abstract. Global Positioning System (GPS) technique has been extensively implemented in determination of crustal deformation globally. With the ability of providing solution up to milimeter (mm) level, this technique has proven to provide a precise estimate of site velocity that represents the actual motion of tectonic plate over a period. Therefore, this study aims to evaluate the site velocity estimation from GPS-derived daily position of station, respective to the global plate motion model and predicted site velocity via Least-Squares Collocation (LSC) method within the tectonically active region of Sundaland. The findings have indicated that stations with precise velocity estimates were consistent with global plate model and predicted velocity, with velocity residuals of 5 mm – 10 mm. However, stations that were severely impacted by continuous earthquake events such as in Sumatra were believed to be induced by the impact with consistently large velocity residuals up to 37 mm. Following the outcomes, this study has provided an insight on the post-seismic decay period plate motion which are induced by continuous tectonic activities respective to modelled plate motion.
10
Metcalfe, Ian. "Tectonic framework and Phanerozoic evolution of Sundaland." Gondwana Research 19, no. 1 (January 2011): 3–21. http://dx.doi.org/10.1016/j.gr.2010.02.016.
Full textDissertations / Theses on the topic "Sundaland"
1
den, Tex Robert-Jan. "Patterns and Processes of Evolution in Sundaland." Doctoral thesis, Uppsala universitet, Evolutionsbiologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-152213.
Full textAbstract:
Biodiversity in the tropics is disproportionately high compared to other habitats, and also under disproportionate threat from human impact. It is necessary to understand how this diversity evolved and how it is partitioned across space in order to preserve it. In this thesis I construct phylogenies of tropical forest dependent vertebrates from Southeast Asia and the islands of the Sunda shelf, a region referred to as Sundaland. I focus on the tree squirrels (genus Sundasciurus) and Asian barbets (Aves: Family Megalaimidae), two taxa with similar ecological characteristics. I use these phylogenies to test hypotheses that have been put forward to explain high levels of tropical diversity including the Pleistocene pump and museum hypotheses. I also use phylogenies to elucidate phylogeographic patterns within the region. I find no evidence for an increase in speciation in the Pleistocene, but I do find within species structure that dates to this period. Common phylogeographic patterns were identified between many forest dependent vertebrates that suggest that populations on the island of Sumatra are generally more closely related to Malay Peninsula populations than to populations on Borneo. From a methodological viewpoint we propose careful usage of universal primers in ancient DNA studies because of our finding of increased risk of amplifying pseudogenes of the mtDNA.
2
Holt, Robert Andrew. "The gravity field of Sundaland : acquisition, assessment and interpretation." Thesis, University College London (University of London), 1998. http://discovery.ucl.ac.uk/1317811/.
Full textAbstract:
The 1995 Sandwell & Smith WGI7.2 satellite gravity map has been compared with high quality ship gravity data offshore Sabah. The standard deviation of the differences between gravity profiles interpolated from WGI7.2 and the ship survey was 5.7 mGal. Spectral analysis indicated that WGI7.2 resolves features with half-wavelengths greater than 10 km. Three hundred new gravity stations, including ten base stations tied to IGSN71, were established during a survey of Sabah and were merged with two previous surveys to complete the gravity coverage of the state at reconnaissance level. New gravity maps of Sundaland, compiled from the Sabah and WGI7.2 gravity data sets have been interpreted. ' Subtraction from these data sets of the long wavelength GEM-T3 gravity anomaly field, which is dominated by the effects of the subducted proto-South China Sea and the ongoing subduction of the Australian, Indian and Philippine Sea Plates, achieved a simple 'regional-residual' separation and the isolation of crustal-scale anomalies. 5' x 5' maps of the depth to Moho, crustal thickness and β (crustal extension) factor beneath the Sunda Shelf and the South China Sea have been produced by 1-D geometric manipulation of the marine gravity field using sediment isopach and bathymetry control data. The average difference between the new Moho map and seismic refraction depth-to-Moho estimates at the south China margin was 0.2 ± 2.0 km. The Moho rises from an average depth of 29 km beneath the Sunda Shelf to a depth of about 16 km beneath the South China Sea oceanic basin. It is estimated that approximately 1100 km of oceanic crust of the proto-South China Sea was subducted at the northwest Borneo margin. Gravity modelling independently confirmed the average 35 mm/yr spreading rate prediction for the southwestern subbasin of the South China Sea oceanic basin from magnetic lineation interpretation. Quantitative interpretation indicates that Sabah is underlain by thick continental crust, and gravity modelling of the Maliau Basin predicts a minimum sediment thickness of 8 km. The ophiolite bodies at Telupid and Darvel Bay are separated by a gravity low and there is no evidence that the two are related. The crustal root of the Crocker Ranges extends to a depth of ~49 km below sea level. In order to reach this present day crustal thickness, the turbiditic sediments forming the Crocker Ranges must have been compressed to less than half of their original lateral extent during the Sabah Orogeny.
3
Dahruddin, Hadi. "Characterization of Sundaland ichthyofauna through DNA barcodes : a case study in Java island." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTG033.
Full textAbstract:
L'archipel indonésien abrite 1218 espèces de poissons d'eau douce disséminées sur 14 000 îles. Englobant trois ensembles géographiques majeurs (Sundaland, Wallacea, Sahul) séparés par deux transitions faunistiques majeures (lignes de Wallace et de Lyddeker), les îles indonésiennes présentent des niveaux hétérogènes de richesse spécifique résultant de divers antécédents géologiques et paléoécologiques. Sundaland abrite 68% du nombre total d’espèces de poissons d’eau douce et constitue l’une des faunes les plus menacées au monde. Contrairement à Wallacea qui résulte d'une mise en place précoce par subduction autour de 40 Mya, Sundaland (Bornéo, Sumatra et Java) a acquis sa configuration moderne au cours des 5 derniers Mya grâce à une combinaison de fragmentation continentale et de subduction. L’état alarmant de l’ichtyodiversité de Sundaland, associé à des lacunes importantes en matière de taxonomie et de connaissances de la distribution des espèces, plaide en faveur d’une réinterprétation moderne au moyen de méthodes standardisées et basées sur l’ADN. L'ichtyodiversité de Java, en particulier, est la plus menacée et la moins connue de Sundaland. Cette thèse vise à répondre à deux questions principales: (1) Les code-barres ADN constituent-ils une approche appropriée pour caractériser l'ichtyodiversité de Java? (2) L’histoire géologique et paléoécologique de Java est-elle un bon prédicteur des profils de diversité et de la structure génétique de la population? Les principaux résultats obtenus sont les suivants: 1) d’importants écarts entre la liste de référence des poissons d’eau douce de Java fondée sur des données historiques et une réévaluation moderne au moyen de code-barres à ADN. Les raisons invoquées sont le biais taxonomique lié à l'inventaire interrompu de l'ichthyofaune de Java au cours des 3 derniers siècles et la raréfaction de plusieurs espèces ciblées par la pêche artisanale. (2) Une réévaluation basée sur l’ADN des limites et de la distribution des espèces pour les genres Nemacheilus et Rasbora a indiqué deux nouveaux taxons, plusieurs cas de diversité cryptique et plusieurs cas d’attribution erronée de populations aux niveaux de l’espèce. Les aires de distribution des espèces semblent être beaucoup plus limitées que considéré précédemment et questionne les modalités de persistance des espèces dans des paysages en mutation. (3) Une évaluation basée sur l'ADN, grace aux code-barres ADN, de la structure génétique des populations de trois espèces largement répandues à Java met en évidence des niveaux élevés de diversité cryptique et des divergences génétiques profondes entre lignées mitochondriales géographiquement restreintes et ne se chevauchant pas. Conformément à une fragmentation liée à la montée des arcs volcaniques à Java qui a entraîné un déclin à long terme de la taille effective de la population, cette tendance plaide en faveur du statut de conservation sensible de ces lignées mitochondriales. Les résultats présentés ici soulignent les avantages d'utiliser une approche standardisée et basée sur l'ADN pour la caractérisation rapide d'une faune mal connue et ouvrir de nouvelles perspectives pour la conservation de l'ichtyofaune de Java et de BaliThe Indonesian archipelago hosts 1218 freshwater fish species disseminated across 14,000 islands. Encompassing three majors geographic assemblages (Sundaland, Wallacea, Sahul) separated by two majors faunistic transitions (Wallace and Lyddeker lines), Indonesian islands display heterogeneous levels of species richness resulting from diverse geological and paleoecological histories. Sundaland itself hosts 68% of the total number of freshwater fish species and constitutes one of the world’s most endangered fauna worldwide. By contrast with Wallacea that results from an early settlement through subduction around 40 Mya, Sundaland (Borneo, Sumatra and Java) has acquired its modern configuration during the last 5 Mya through a combination of continental fragmentation and subduction. The alarming state of Sundaland ichthyodiversity, combined with major taxonomy and distribution knowedge gaps, urges for a modern reapparaisal through standardized DNA-based methods. The ichtyodiversity of Java in particular, is the most threatened and the less known of Sundaland. This dissertation aims at addressing two main questions: (1) Is DNA barcoding a suitable approach to characterize the ichthyodiversity of Java? (2) Is the geological and paeloecological history of Java a good predictor of diversity patterns and population genetic structure? The main results evidence: (1) large discrepancies between the checklist of the Java freshwater fishes based on historical records and a modern re-appraisal through DNA barcodes. Reasons invoqued are the taxonomic bias related to the interrupted inventory of Java ichthyofauna during the last 3 centuries and the rarefaction of several species targeted by artisanal fisheries. (2) A DNA-based reappraisal of species boundaries and distribution for the genera Nemacheilus and Rasbora indicated two new taxa, several cases of cryptic diversity and several cases of wrong assignement of populations to the species levels. Species range distributions appear to be much more restricted than previously thoughts and question the persistence of these species in changing landscapes. (3) A DNA-based assessment through DNA barcodes of the population genetic structure of three widespread species in Java evidences high levels of cryptic diversity and deep genetic divergences among geographically restricted and non-overlapping mitochondrial lineages. Consistent with a fragmentation related to the rise of volcanic arches in Java that prompted a long-term declines of historical effective population size, this pattern argue for the sensitive conservation status of these mitochondrial lineages. The results presented here highlights the benefits of using a standardized DNA-based approach for the fast characterization of a poorly known fauna and open new perspectives in the conservation of the ichtyofauna of Java and Bali
4
Welton, Luke J. "Diversification and Speciation Across Sundaland and the Philippines: The Effects of 30 Million Years of Eustatic Flux." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/6178.
Full textAbstract:
I highlight two squamate lineages endemic to Southeast Asia, the Asian water monitors (Varanus salvator Complex) and the Angle-headed lizards (Agamidae: Gonocephalus), and elucidate their systematic affinities and historical biogeography. My results represent novel phylogenetic inferences, with biogeographic histories and diversification events corresponding to major climatic fluctuations over the past 30 million years. Additionally, I solidify the taxonomy and systematics of the Varanus salvator Complex, and enumerate more than a dozen Gonocephalus lineages as candidate species in need of taxonomic scrutiny. Lastly, I investigate contemporary and historical patterns of dispersal throughout Sundaland, and between Sundaland and the Philippines.
5
Meijaard, Erik, and emeijaard@tnc org. "Solving Mammalian Riddles." The Australian National University. Faculty of Arts, 2004. http://thesis.anu.edu.au./public/adt-ANU20050924.221423.
Full textAbstract:
Since the mid 19th century, the biogeography of island South-East Asia has been the subject of much study. Early researchers explained many of the species distribution patterns by the rise and fall of sea levels and land. This and the work of other researchers culminated in a theory that emphasized the role of Pleistocene sea level low stands in species evolution. With the advent of newly developed molecular techniques, however, it became clear that many species divergence events had taken place before the Pleistocene and a biogeographical theory focusing on Pleistocene sea level changes was inadequate. In this research, I have developed a new biogeographic model that explains present-day distribution patterns and evolutionary relationships between species. I use this new model to explain 10 ‘mammalian riddles’, i.e. evolutionary or distribution patterns in selected mammal species groups that could not be explained with the existing theories. I developed the new model by analyzing the geological literature for this region, and by mapping palaeogeographical and palaeoenvironmental changes for the last 20 million years. In addition I compiled information on the palaeontological record for the region and on divergence times between taxa using a molecular clock assumption. These phylogenetic data were compared with the palaeomaps to assess whether particular divergence events could be correlated with certain palaeogeographical or palaeoenvironmental changes. The combination of these two information sources has resulted in a much-improved understanding of mammalian evolution in island SE Asia. Using this model it is now possible to relate important palaeoenvironmental events, such as the Late Miocene cooling, an Early–Middle Pliocene highstand, or the emergence and submergence of a land bridge between the Malay Peninsula and Java to evolutionary changes in species. I test the accuracy of the new model by analysing the relationships within several mammal groups using craniometric and molecular analysis. The observed relationships and deduced timing of divergence between taxa could in many cases be explained by the model, which indicates that it is relatively accurate. In addition, with the new model I have been able to find solutions to most mammalian riddles, although these results require further testing. Overall, I therefore believe I have made a significant contribution to the biogeographical understanding of island SE Asia.
6
Sholihah, Arni. "Diversification des biotas aquatiques de Sundaland : accumulation de la biodiversité chez les poissons d'eau douce et distribution dans un hotspot de biodiversité." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTG024.
Full textAbstract:
Sundaland est l'un des points chauds de biodiversité les plus menacés, en raison d’une augmentation rapide des menaces au cours des dernières décennies. Couvrant la péninsule malaise, Sumatra, Java et Bornéo, cette région possède l'une des plus grandes richesses en espèces et endémisme pour les vertébrés, y compris les poissons d'eau douce. Cette biodiversité a longtemps attiré l'attention des biologistes évolutionnistes, notamment en raison de la complexité de l'histoire géologique de Sundaland. Cette question a été abordée en explorant les patrons de fragmentation et dispersion durant la diversification des espèces de poissons d'eau douce de Sundaland. Ainsi, j'ai d'abord cherché à évaluer la correspondance entre la distribution des lignées moléculaires de plusieurs taxons avec les limites des paléorivières en ré-analysant les données moléculaires existantes avec une couverture biologique et spatiale représentative en Asie du Sud-Est (en particulier pour Sundaland). Deuxièmement, je me suis concentré sur l’estimation de l’âge des clades et de la répartition géographique des lignées de Rasborinae, un groupe répandu et extrêmement diversifié de poissons d’eau douce primaires du Sundaland, pour tester l’hypothèse des Paléorivières du Pléistocène en utilisant des données empiriques nouvellement générées. Sur les deux études, je me suis posé les questions suivantes: 1) les paléorivières servaient-elles de corridors de dispersion entre les îles pendant les périodes glaciaires du Pléistocène; 2) les bassins versants des paléorivières ont-ils initié une divergence allopatrique à travers leurs frontières; et 3) les fluctuations climatiques du Pléistocène ont-elles augmenté les taux de speciation. Dans l'ensemble, un niveau élevé de diversité cryptique est observé. Les aires ancestrales inférées révèlent une origine continentale des lignées de poissons d'eau douce de Sundaland, datée à l'Oligocène. Ce résultat valide l'hypothèse d’une installation pré-pléistocène. Ces lignées sont entrées à Sundaland par la paléorivière de la Sonde Nord à Bornéo et se sont dispersées par la suite via une dispersion à longue distance, souvent suivie de diversification in situ. Ces résultats suggèrent que la partie de Bornéo de la paléorivière de la Sonde Nord est le centre d'origine le plus probable des poissons d'eau douce de Sundaland. Contrairement à l'hypothèse initiale que l'abaissement du niveau de la mer en périodes glaciaires reconnecte les bassins versants au sein des paléorivières, cela n'ouvre pas nécessairement de canaux de dispersion inter-îles pour les poissons d'eau douce. Les couloirs de savane et d'écosystèmes forestiers saisonniers à l'intérieur du Sundaland ont servi de barrière à la dispersion. En outre, la perméabilité des limites physiques des bassins versants des paléorivières, ainsi que les variabilités géomorphologique et écologique ont créé temporairement des flux de gènes. Bien qu'une proportion significative des lignées de poissons d'eau douce du Sundaland datent du Pléistocène, nous avons constaté que la dynamique du Pléistocène n'affectait pas le taux de diversification. Les modèles de diversification dépendant du niveau de la mer expliquent mal les schémas de prolifération des espèces pour tous les clades, à l'exception de Channa. En outre, aucun des taxons examinés ne présente de taux de diversification en baisse comme le suggère le modèle de diversification dépendante de la diversité (DDD). Il est suggéré alors que les fluctuations eustatiques du Pléistocène et la dynamique des paléorivières ne sont pas les seuls moteurs de la diversification des poissons d'eau douce du Sundaland, mais seulement une partie des aspects abiotiques qui l'affectent. Les fluctuations climatiques du Pléistocène ont probablement interagi avec d'autres facteurs tels que: la géomorphologie du paysage, la variabilité des écosystèmes et les caractéristiques biologiques des organismesSundaland is one of the most threatened biodiversity hotspots, experiencing a fast increase of threat levels during last decades. Covering Malayan Peninsula, Sumatra, Java and Borneo, this hotspot has one of the highest species richness and endemism for vertebrates in SEA, including freshwater fishes. This level of biodiversity has long attracted the attention of evolutionary biologists, particularly by considering effects of Sundaland complex geological history. This study addressed it by exploring time frame of vicariance and dispersal during diversity build-up of freshwater fish species in Sundaland. To support this, we first aimed to assess the match between distribution of molecular lineages from multiple taxa with palaeoriver boundaries using metadata analysis of existing molecular dataset with representative biological and spatial coverage in Southeast Asia (especially in Sundaland). Second, we focussed on estimating clades’ age and geographic distribution of Rasbora lineages in relation to the Pleistocene Palaeoriver Hypothesis by utilising newly generated empirical data for Rasborinae, a widespread and extremely diversified group of primary freshwater fishes in Sundaland. On both steps, we questioned: 1) if palaeorivers served as corridors of dispersal between islands during Pleistocene sea levels low stands; 2) if palaeoriver watersheds initiated allopatric divergence across their boundaries; and 3) if Pleistocene climatic fluctuation increased rates of species diversification. Overall, this study detected high level of cryptic diversity. Ancestral area reconstructions revealed that Sundaland freshwater fish lineages originated from Mainland Asia, and further colonised the region since Oligocene. This result validated the pre-Pleistocene settlement hypothesis. These lineages entered Sundaland mainly through North Sunda palaeoriver in contemporary Borneo and dispersed to other parts of Sundaland via long distance dispersal, often followed by in situ diversification. These results suggest Bornean part of North Sunda palaeoriver is the most likely centre of origin for Sundaland freshwater fishes. Contrary to the initial hypothesis, we found that although lowered sea level during glacial periods reconnected watersheds within palaeorivers, it did not necessarily open up inter-island dispersal channels for freshwater fishes. Corridors of savanna and seasonal forest ecosystems in the interior of Sundaland served as barrier to dispersal. Also, permeability of the physical boundaries of palaeoriver’s watersheds as well as geomorphological and habitat variabilities within palaeoriver created respectively gene flow between palaeorivers and allopatric speciation within palaeoriver. Moreover, although significant proportion of Sundaland freshwater fish lineages originated during Pleistocene, we found that Pleistocene dynamics did not affect diversification rate as sea level-dependent diversification models poorly account for species proliferation patterns for all clades excepting Channa. Besides, none of the taxa examined has declining diversification rates as suggested by diversity-dependent diversification (DDD) model. It is suggested then that global Pleistocene eustatic fluctuation and regional paleoriver dynamics are not sole drivers for Sundaland freshwater fish diversification, but only a part of abiotic aspects affecting it. Pleistocene Climatic Fluctuations likely interacted with other factors such as: landscape geomorphology, local ecosystem/habitat variability and life history traits of organisms
7
Sarr, Anta-Clarisse. "Subsidence Quaternaire en Asie du Sud-Est : de la dynamique du manteau à la circulation atmosphérique - Modélisation géomorphologique, géodynamique et climatique." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAU045/document.
Full textAbstract:
En défléchissant la Terre, la topographie dynamique module l'extension des zones inondées dans les régions où l'altitude est proche du niveau marin. Ce phénomène contribue ainsi à modifier la paléogéographie à grande échelle et ont un impact sur les sphères externes (atmo-, hydro- et bio-sphère) en altérant notamment les circulations atmosphériques et océaniques. Ces travaux de thèse, qui s’appuient sur une approche interdisciplinaire, illustrent la chaîne de connections entre dynamique mantellique et climat à travers l'étude de l'évolution Quaternaire du Continent Maritime. Le caractère insulaire de la région et la présence de mers peu profondes comme la mer de Java, permettent des modifications rapides de la répartition terre-océan à grande échelle, et en font un cas idéal pour étudier les connections entre géodynamique et climat. D’autre part, la dynamique mantellique, excitée par les nombreuses subductions, y est très active et contribue à déformer la surface et la dynamique climatique régionale est étroitement associée à la géographie particulière de l’archipel Indonésien.Les changements paléogéographiques sont d'abord révélés par la cartographie des morphologies côtières. Celle-ci souligne la répartition contrastée de la déformation Quaternaire en soulignant le soulèvement général de la région centrale (Wallacea), alors que les deux plateformes continentales localisées à l'Ouest et au Sud-Est subsident. L'utilisation combinée des observations et de la modélisation de la croissance des récifs coralliens est utilisée afin de quantifier la vitesse verticale de déformation. Notre méthode est basée sur la comparaison entre la morphologie des récifs observés sur la plateforme de la Sonde, à l'ouest de l'Asie du Sud-Est, et les morphologies récifales issues des simulations numériques et permet une quantification inédite de la vitesse de subsidence de la plateforme. Les résultats suggèrent que la Sonde était émergée de manière permanente avant 400 000 ans, formant une masse continentale entre les îles de l'Ouest Indonésien et le continent asiatique. Les causes de ces changements paléogéographiques sont appréhendées à l'aide de la modélisation mécanique de la géodynamique. Un modèle numérique en trois dimensions d'une zone de subduction a été utilisé afin de d'explorer les causes dynamiques de la déformation. L'analyse des simulations permet de décrire l'évolution spatio-temporelle de la déformation à l'aplomb d'une zone de subduction, lors d'une perturbation provoquée par l'arrivée dans la fosse d'un bloc continental ou d'un plateau océanique, un cas simplifié similaire à l'Asie du Sud-Est. Les résultats montrent que lors d'un épisode de collision, l'initiation d'une déchirure dans la plaque en subduction générée par l'entrée dans la fosse de matériel peu dense entraîne une modification de l'écoulement mantellique. Cette modification provoque un épisode de subsidence dynamique qui fait suite à un épisode de surrection provoquée par la collision. Les vitesses de déformations calculées ont un ordre de grandeur comparable aux vitesses de déformations enregistrées et modélisées à l'échelle régionale. Les conséquences des changements paléogéographiques sont appréhendées à l'aide d'un modèle du climat IPSL-CM5A2. Les résultats montrent que la présence d'une plateforme de la Sonde émergée provoque une augmentation saisonnière des précipitations sur le Continent Maritime. Cette augmentation est engendrée par une intensification de la convergence à l'échelle régionale contrôlée par le chauffage radiatif des surfaces continentales exposées. L'exposition de la plateforme de la Sonde engendre également une modification du transport dans le détroit de Makassar avec un impact local sur la salinité et les températures de surface de l'océan. Nos analyses montrent par ailleurs que l'augmentation de la saisonnalité des précipitations est indépendante de la paramétrisation de la convection et des nuages dans le modèleDynamic topography modulates the extension of inundated areas, at places where elevation is near sea level, by deflecting the surface of the Earth. This phenomenon produces large-scale paleogeography changes, which in turn modify external spheres (atmo-, hydro- and biosphere) by subsequent alteration of atmospheric and oceanic circulations and biodiversity. This inter-disciplinary work illustrates the connection string between Earth mantle dynamics and climate through the study of Quaternary evolution of South East Asia. The insularity of the region and the presence of low bathymetry seas, as the Java sea, enable fast and efficient modifications of land-sea mask and make it an ideal case for studying the connection between geodynamics and climate. Mantle flow, excited by the numerous subduction zones, is vigorously stirred and contributes to surface deformation. In this region, climate dynamics is also tightly related to the peculiar geography of the Indonesian archipelago. Paleogeographic changes are first revealed by coastal morphologies. They show the contrasted pattern of large-scale Quaternary deformation that underlines general uplift within the central-eastern part of the region, namely Wallacea, whereas the continental shelves, to the West and Southeast, are more likely subsiding. The combination of field observations with numerical modeling of coral reef growth is used to quantify vertical deformation. Our method is based on reef morphology (terrace number, depth, modern reef length) that we observed on the Sunda shelf (Western South East Asia) and reef morphologies obtained by numerical modeling, and enable an original quantification of subsidence rates of the platform. The results imply that Sundaland region was entirely and permanently emerged before 400 000 yr and formed at this time a unique continental mass between West Indonesian islands and continental Asia. The causes of paleogeographic changes are explored using modeling of regional geodynamics. A three-dimension subduction numerical model was devised to simulate the dynamical origin of deformation. This model analysis enables us to describe the spatio-temporal evolution of the deformation above a subduction zone in case of perturbation induced by the arrival at the trench of a continental block or oceanic plateau, a simplified case that is similar to SE Asia. Our results show that during a collisional episode, slab tearing generated by the arrival of light material unable to subduct is responsible for changes in mantle convection. Those changes are responsible for dynamic subsidence that followed an uplift event related to the first stages of collision. Inferred deformation rates have an range of magnitude similar to both measured and modeled rates at regional scale. The consequences of paleogeographic changes are studied using general circulation model simulations. Results show that the presence of an emerged Sunda shelf leads to a seasonal increase in precipitation over the Maritime Continent. This increase is related to seasonal increase in large-scale convergence induced by thermal heating of exposed land surfaces, a situation that, as we show, occurred before 400 ka. Sunda shelf exposure is also responsible for changes in horizontal water transport within the Makassar strait that modify sea surface salinities and temperatures at local scale. Our analysis further shows that increased precipitation seasonality is independent on model convection and cloud parameterization
8
Sautter, Benjamin. "Influence de l’héritage structural sur le rifting : exemple de la marge Ouest de La Sonde." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEE015.
Full textAbstract:
Les bassins sédimentaires se développent souvent le long des zones internes d'anciennes chaînes orogéniques. Nous considérons dans ce projet la Péninsule Malaise (Marge Ouest de la Sonde) comme un haut crustal séparant deux régions de croûte continentale étirée ; les bassins d'Andaman/Malacca du côté occidental et les bassins thaïlandais/malais à l'est. Plusieurs stades de rifting ont été documentés grâce à une intense exploration géophysique régionale. Cependant, la corrélation entre les bassins riftés en mer et le noyau continental terrestre est mal connue. Dans ce mémoire, nous explorons par la cartographie, de missions de terrain et les données sismiques, comment ces structures réactivent des hétérogénéités mésozoïques crustales préexistantes. Le noyau continental semble être relativement peu déformé après l'orogénèse triasique Indosinienne. L’épais méga-horst crustal est bordé par des zones de cisaillement complexes (zones de failles de Ranong, Klong Marui et du Batholithe du Main Range) initiées au Crétacé Supérieur/Paléogène inférieur lors d’une déformation transpressive d’échelle crustale et plus tard réactivées à la fin du Paléogène. L'extension est localisée sur les bords de cette épine dorsale crustale le long d'une bande où la précédente déformation crétacée supérieure est bien exprimée. À l'ouest, le plateau continental est aminci en trois étapes principales qui correspondent à des blocs basculés d’échelle crustale bordés par de larges failles contre-régionales profondément enracinées (Bassin de Mergui). À l'est, des systèmes de rifts prononcés sont également présents, avec de grands blocs basculés (les bassins western Thai, de Songkhla et de Chumphon) qui pourraient représenter de grands boudins de croûte. Dans le domaine central, l'extension est limitée à de demi-grabens étroits isolés de direction N-S développés sur une croûte continentale épaisse, et contrôlés par failles normales pelliculaires, qui se développent souvent au contact entre les granitoïdes et l’encaissant. Les bords extérieurs des régions affectées par le boudinage crustal délimitent le bassin d'Andaman plus grand et profond à l'ouest et les bassins Malais et de Pattani à l'est. À une échelle régionale, les bassins riftés ressemblent à des structures en-échelon N-S le long de grandes bandes de cisaillement de NW-SE. Le rifting est accommodé par de larges failles normales à faible pendage (LANF : Low Angle Normal Faults) réactivant les morpho-structures de la croûte telles que de larges plis et batholithes mésozoïques. Les bassins profonds d'Andaman, Malais et de Pattani semblent situés sur une croûte à rhéologie plus faible qui pourrait être héritée des blocs continentaux dérivés du Gondwana (Birmanie, Sibumasu, et Indochine). L'ensemble des long bassins étroits au coeur de la région (bassins de Khien SA, de Krabi, et du Malacca) apparaissent avoir souffert de relativement peu d'extension. Ce travail montre que le cœur de l’orogène Crétacé supérieure est faiblement réactivé avec seulement quelques traces d’un étirement précoce par rapport aux bords qui sont sujets à un amincissement crustal en larges blocs basculés. A mesure que la déformation augmente, le rifting migre et se localise vers les zones externes et sa géométrie apparait plus « molle » suggérant un mécanisme influencé par la thermique. La coexistence de ces deux géométries au sein d’un même cycle de rifting fait de la marge Ouest de la sonde un cas d’étude édifiantSedimentary basins often develop above internal zones of former orogenic belts. We hereafter consider the Malay Peninsula (Western Sunda) as a crustal high separating two regions of stretched continental crust; the Andaman/Malacca basins in the western side and the Thai/Malay basins in the east. Several stages of rifting have been documented thanks to extensive geophysical exploration. However, little is known on the correlation between offshore rifted basins and the onshore continental core. In this paper, we explore through mapping and seismic data, how these structures reactivate pre-existing Mesozoic basement heterogeneities. The continental core appears to be relatively undeformed after the Triassic Indosinian orogeny. The thick crustal mega-horst is bounded by complex shear zones (Ranong, Klong Marui and Main Range Batholith Fault Zones) inititiated during the Late Cretaceous/Early Paleogene during a thick-skin transpressional deformation and later reactivated in the Late Paleogene. The extension is localized on the sides of this crustal backbone along a strip where earlier Late Cretaceous deformation is well expressed. To the west, the continental shelf is underlain by three major crustal steps which correspond to wide crustal-scale tilted blocks bounded by deep rooted counter regional normal faults (Mergui Basin). To the east, some pronounced rift systems are also present, with large tilted blocks (Western Thai, Songkhla and Chumphon basins) which may reflect large crustal boudins. In the central domain, the extension is limited to isolated narrow N-S half grabens developed on a thick continental crust, controlled by shallow rooted normal faults, which develop often at the contact between granitoids and the host-rocks. The outer limits of the areas affected by the crustal boudinage mark the boundary toward the large and deeper Andaman basin in the west and the Malay and Pattani basins in the east. At a regional scale, the rifted basins resemble N-S en-echelon structures along large NW-SE shear bands. The rifting is accommodated by large low angle normal faults (LANF) running along crustal morphostructures such as broad folds and Mesozoic batholiths. The deep Andaman, Malay and Pattani basins seem to sit on weaker crust inherited from Gondwana-derived continental blocks (Burma, Sibumasu, and Indochina). The set of narrow elongated basins in the core of the Region (Khien Sa, Krabi, and Malacca basins) suffered from a relatively lesser extension. This work shows that the core of the late Cretaceous Orogeny is weakly reactivated during the subsequent rifting with only few evidences of stretching whereas its sides are thinned with large tilted blocks. The rifting migrates and localizes on the external regions and its geometry appears more ductile suggesting the influence of a thermal activity in the process. The coexistence of both geometries in a single rifting cycle makes the western margin of Sundaland an enlightening example
9
Rodrigues, Simão Moreira. "Settlement and flooding of the ancient Sundaland continent." Master's thesis, 2016. http://hdl.handle.net/1822/45513.
Full textAbstract:
Dissertação de mestrado em Genética MolecularThe region of Southeast Asia (SEA) is commonly sub-divided into Mainland (MSEA) and Island SEA (ISEA). However, 15 thousand years (ka) ago MSEA and West ISEA were a single land mass named the Sundaland continent until sea-level rises following the Ice Age led to the flooding of a large part of the land, resulting in today’s topography and an increment of the coastline. The Sundaland continent was most probably colonized by modern humans more than 50 ka following a Southern Route out of Africa through the Indian Subcontinent [1]. Here 1239 complete mitochondrial genomes were analyzed corresponding to lineages from SEA and the Pacific (PAC) (of which 220 are novel) that most likely represent descending lineages from the first founders of SEA whose coalescence ages provide a direct estimate of the age of settlement. The data was analyzed phylogenetically using different methods (parsimony, Bayesian analysis and maximum likelihood) and estimated ages of the clades using a range of standard human mitochondrial DNA molecular clocks [2]. The first settlement of the Sundaland continent was estimated to have occurred between 55 and 60 ka, a value that fits well the current archaeological record. This time frame also corresponds to the revised probable time of extinction of the Homo floresiensis in the island of Flores (Indonesia), which could have been prompted by modern human presence. After the Last Glacial Maximum the Sunda shelf was flooded due to the sea-level rising, whose episodic occurrences were likely to cause population displacement and expansions of the local populations [3]. Following the first settlement our major phylogeographic signal indicates lineage splits between ISEA and MSEA starting after 20 ka with a peak at about 8 ka, the time of the last episodic flood [3].
A região do Sudeste Asiático (SEA) é geralmente subdividida em Continental (CSEA) e Ilhas (ISEA). No entanto, há 15 mil anos atrás (ka) o CSEA e a zona oeste da ISEA eram uma única massa de terra chamado o continente Sundaland até que subidas do nível do mar na sequência da Idade do Gelo levaram à inundação de uma grande parte da terra, resultando na topografia de hoje e num aumento da extensão de costa. O continente Sundaland foi provavelmente colonizada por seres humanos modernos há mais de 50 ka através de uma rota do sul da África pelo do subcontinente indiano [1]. Neste trabalho foram analisados 1239 genomas mitocondriais completos de SEA e do Pacífico (PAC) (dos quais 220 são novos) que representam linhagens descendentes dos primeiros fundadores da SEA cujas idades de coalescência fornecem uma estimativa direta da idade de colonização. Foram analisados os dados filogeneticamente utilizando métodos diferentes (parcimónia, análise Bayesiana e máxima verossimilhança) e as idades estimadas dos clades utilizando uma gama de relógios moleculares de DNA mitocondrial humanos [2]. Estimou-se a primeira colonização do continente Sundaland ter ocorrido entre 55 e 60 ka, um valor que se encaixa bem no registro arqueológico atual. Este prazo corresponde também ao tempo provável revisto da extinção do Homo floresiensis na ilha de Flores (Indonésia), o que poderia ter sido motivada pela presença humana moderna. Após o Último Máximo Glacial a placa da Sunda foi inundada devido à subida do nível do mar, cujas ocorrências episódicas foram provavelmente a causa do deslocamento da população e expansões das populações locais [3]. Na sequência da primeira colonização o nosso principal sinal filogeográfico indica “splits” nas linhagens entre ISEA e MSEA começando após 20 ka com um pico em cerca de 8 ka, data da última inundação episódica [3].
10
Pethe, Swardhuni. "Subsurface analysis of Sundaland basins : source rocks, structural trends and the distribution of oil fields." 2013. http://liblink.bsu.edu/uhtbin/catkey/1741652.
Full textAbstract:
According to the Ade observation (Ade, W., pers. Comm.) “95% of all commercial oil fields in the Sumatra region occur within 17 km of seismically mappable structural grabens in the producing basins”. The Ade observation proposes a link between the subsidence of the source rocks (the Talang Akar Formation) in the grabens and the maturity of the organic material. To test the validity of the Ade observation, subsurface mapping of the region was carried out using geophysical logs. Using the well log information, the basement and the formation tops have been mapped with a special emphasis on Talang Akar and Air Benakat Formations. The isopach maps of these formations show that most of the producing wells on the Sunda shelf are in fact located in and around the major structural basins. Trends in the occurrence of the oil fields have also been observed which are analogous to the orientation of the grabens. Structural mapping of the basins have identified several wrench faults. These are of particular interest as wrench faults provide good structural traps for oil in the Los Angeles and the North Sumatra Basins and may prove to be very important for future exploration in southern Sumatra and northwest Java. In South Sumatra Basin, 77.78% of the potential oil fields are located in the 17 km margin from the grabens. For Sunda/Asri Basins and the Ardjuna Basin, it is 100 and 92 respectively. Identifying the source rocks in this 17 km window will enhance the success rate of oil exploration in the Sundaland Basins.Department of Geological Sciences
Books on the topic "Sundaland"
1
Polgar, Gianluca, and Zeehan Jaafar. Endangered Forested Wetlands of Sundaland. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-52417-7.
Full text
2
Anand, Krishna. The wisdom of Sundaland: The ancient unrecorded prehistory of the Indonesian archipelago. Jakarta: Gramedia Pustaka Utama, 2012.
Find full text
3
Krishna, Anand. From Bali to Belo Horizonte in pursuit of the indigenous wisdom of Sundaland and South America to save our planet. [Kuta, Bali]: Anand Krishna Global Co-operation in collaboration with Anand Ashram Foundation, 2009.
Find full text
4
Almario, Virgilio S. Sundalong Patpat =: Thin Soldier. Quezon City, Philippines: Adarna Book Services, 1997.
Find full text
5
Polgar, Gianluca, and Zeehan Jaafar. Endangered Forested Wetlands of Sundaland: Ecology, Connectivity, Conservation. Springer, 2018.
Find full text
6
Polgar, Gianluca, and Zeehan Jaafar. Endangered Forested Wetlands of Sundaland: Ecology, Conservation and Management. Springer, 2017.
Find full text
7
sundalong patpat. Quezon City, Philippines: adarna book services, 1997.
Find full text
8
Sundalong Patpat, Thin Soldier. Ferdinand R. Doctolero, 1997.
Find full text
9
Sundalong Patpat, Thin Soldier: Envisioning the next 50 years. Quezon City philippines: Adarna Book Service in Quezon City Philippines, 1997.
Find full textBook chapters on the topic "Sundaland"
1
Polgar, Gianluca, and Zeehan Jaafar. "Sundaland Wetlands." In Endangered Forested Wetlands of Sundaland, 1–16. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52417-7_1.
Full text
2
Hall, Robert, and Christopher K. Morley. "Sundaland basins." In Continent-Ocean Interactions Within East Asian Marginal Seas, 55–85. Washington, D. C.: American Geophysical Union, 2004. http://dx.doi.org/10.1029/149gm04.
Full text
3
Polgar, Gianluca, and Zeehan Jaafar. "Status: Past and Present." In Endangered Forested Wetlands of Sundaland, 17–39. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52417-7_2.
Full text
4
Polgar, Gianluca, and Zeehan Jaafar. "Ecotonal Networks (ENTs)." In Endangered Forested Wetlands of Sundaland, 41–55. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52417-7_3.
Full text
5
Polgar, Gianluca, and Zeehan Jaafar. "Flagship Species." In Endangered Forested Wetlands of Sundaland, 57–88. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52417-7_4.
Full text
6
Polgar, Gianluca, and Zeehan Jaafar. "Ecotourism and the Future of the Forested Wetlands of Sundaland." In Endangered Forested Wetlands of Sundaland, 89–93. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52417-7_5.
Full text
7
"Sundaland." In Encyclopedic Dictionary of Archaeology, 1328. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58292-0_191277.
Full text
8
"2 Homo erectus in Sundaland." In Prehistory of the Indo-Malaysian Archipelago, 39–68. University of Hawaii Press, 1997. http://dx.doi.org/10.1515/9780824874681-003.
Full text
9
Corlett, Richard T. "Biogeography." In The Ecology of Tropical East Asia, 62–87. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198817017.003.0003.
Full textAbstract:
This chapter deals with the geographical distribution of plants and animals within the region. Tropical East Asia is defined as the eastern half of the Oriental Region and the other biogeographical regions are briefly described. The transitions between Tropical East Asia and the adjacent Australian and Palearctic Regions are described and discussed, as well as the less clearly defined transition with the rest of India. Patterns of diversity within Tropical East Asia are considered and four major subregions (Wallacea, the Philippines, Sundaland, and Indochina) are recognized. The remainder of the chapter deals with the biogeography of the numerous islands in the region, including the islands on the Sunda Shelf, Hainan and Taiwan, the Ryukyu and Ogasawara Islands of Japan, the Andaman and Nicobar Islands of India, the Mentawai Islands and others off the west coast of Sumatra, Krakatau, the Philippines, Sulawesi, and the islands of Wallacea.
10
Ono, Rintaro, Alfred Pawlik, and Riczar Fuentes. "Island Migration, Resource Use, and Lithic Technology by Anatomically Modern Humans in Wallacea." In Pleistocene Archaeology - Migration, Technology, and Adaptation. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93819.
Full textAbstract:
Island migration and adaptation including both marine and terrestrial resource use and technological development by anatomically modern humans (AMH) are among the most significant issues for Pleistocene archaeology in Southeast Asia and Oceania, and directly related to the behavioral and technological advancements by AMH. This paper discusses such cases in the Wallacean islands, located between the past Sundaland and the Sahul continent during the Pleistocene. The Pleistocene open sea gaps between the Wallacean islands and both landmasses are very likely the major factor for the relative scarcity of animal species originating from Asia and Oceania and the high diversity of endemic species in Wallacea. They were also a barrier for hominin migration into the Wallacean islands and Sahul continent. We summarize three recent excavation results on the Talaud Islands, Sulawesi Island and Mindoro Island in Wallacea region and discuss the evidence and timeline for migrations of early modern humans into the Wallacean islands and their adaptation to island environments during the Pleistocene.
Conference papers on the topic "Sundaland"
1
Sausan, Sarah, Zulfikar Simatupang, Adekunle Olayinka Osundina, and Geovani Christopher Kaeng. "Overpressure Prediction Challenges in Deepwater Sundaland." In International Conference and Exhibition, Melbourne, Australia 13-16 September 2015. Society of Exploration Geophysicists and American Association of Petroleum Geologists, 2015. http://dx.doi.org/10.1190/ice2015-2224204.
Full text
2
Satyana, A. H. "Trilogy Of Southeast Sundaland Terranes: Re-Uniting Drifted Terranes of Southeast Sundaland Using Common Marker ff The Late Cretaceous Volcanics to Volcanic-Clastics of The Meratus Mountains, South Sulawesi, And Sumba - Implications For Petroleum Opportunities." In Indonesian Petroleum Association 44th Annual Convention and Exhibition. Indonesian Petroleum Association, 2021. http://dx.doi.org/10.29118/ipa21-g-39.
Full textAbstract:
Amalgamation and dispersion of terranes characterized the growth and slivering of Southeast Sundaland into the present configuration of central Indonesia. Amalgamation of the Paternoster-West Sulawesi terrane which docked, in mid-Cretaceous time, onto the Southwest Borneo terrane, thus closed the Meso-Tethys Ocean at the Meratus suture. This made Sundaland expand its area to the east and southeast. In the Late Cretaceous time, the Ceno-Tethys oceanic plate subducted beneath Southeast Sundaland, giving rise to coeval volcanism in the Meratus Mountains and the surrounding areas. Dispersion of some terranes in Southeast Sundaland occurred in the Paleogene through successive rifting and the opening of the Makassar Straits and the Flores Sea, with an eastern drift of South Sulawesi and Sumba away from Southeast Kalimantan to their present positions. Prior to the dispersion, the Meratus Mountains, South Sulawesi, and Sumba (called here the Trilogy of Southeast Sundaland) were united or adjacent to each other and underwent similar Late Cretaceous volcanism. The Late Cretaceous Volcanics and/or Volcanic-Clastics are therefore the common marker of their union. Our field studies in 2018-2019 at Sumba, South Sulawesi, and the Meratus Mountains (South Kalimantan) in the program, called the “Trilogy of Southeast Sundaland Terranes,” sampled the Late Cretaceous volcanics/ volcanic-clastics in these areas to prove that they were once united. Petrographic, petrochemical, isotopic, and geochronological data of the rock formations, based on the recent and previous analyses, show that these rocks, in the three terranes, are co-genetic spatially and temporally thus indicating their previous unity. The paired Paleogene dispersions of South Sulawesi from South Kalimantan, and successively Sumba from South Sulawesi, had resulted in rifted structures in the present Makassar Straits, the Flores Sea, and offshore Sumba. The rifted structures contain source rocks, reservoirs, seals, and structural-stratigraphic traps. Oil has been discovered therein, so further exploration is required since these objectives have not been sufficiently explored in the past and are thus still interesting.
3
"Mesozoic Tectonic Setting of SE Sundaland After Magmatism and Suture Evidences in JS-1 Ridge Area." In Indonesian Petroleum Association 44th Annual Convention and Exhibition. Indonesian Petroleum Association, 2021. http://dx.doi.org/10.29118/ipa21-g-14.
Full textAbstract:
Mesozoic plate convergence in SE Sundaland has been a source of debate for decades. A determination of plate convergence boundaries and timing have been explained in many publications, but not all boundaries were associated with magmatism. Through integration of both plate configurations and magmatic deposits, the basement can be accurately characterized over time and areal extents. This paper will discuss Cretaceous subductions and magmatic arc trends in SE Sundaland area with additional evidence found in JS-1 Ridge. At least three subduction trends are captured during the Mesozoic in the study area: 1) Early Jurassic – Early Cretaceous trend of Meratus, 2) Early Cretaceous trend of Bantimala and 3) Late Cretaceous trend in the southernmost study area. The Early Jurassic – Early Cretaceous subduction occurred along the South and East boundary of Sundaland (SW Borneo terrane) and passes through the Meratus area. The Early Cretaceous subduction occurred along South and East boundary of Sundaland (SW Borneo and Paternoster terranes) and pass through the Bantimala area. The Late Cretaceous subduction occurred along South and East boundary of Sundaland (SW Borneo, Paternoster and SE Java – South Sulawesi terranes), but is slightly shifted to the South approaching the Oligocene – Recent subduction zone. Magmatic arc trends can also be generally grouped into three periods, with each period corresponds to the subduction processes at the time. The first magmatic arc (Early Jurassic – Early Cretaceous) is present in core of SW Borneo terrane and partly produces the Schwaner Magmatism. The second Cretaceous magmatic arc (Early Cretaceous) trend is present in the SW Borneo terrane but is slightly shifted southeastward It is responsible for magmatism in North Java offshore, northern JS-1 Ridge and Meratus areas. The third magmatic arc trend is formed by Late Cretaceous volcanic rocks in Luk Ulo, the southern JS-1 Ridge and the eastern Makassar Strait areas. These all occur during the same time within the Cretaceous magmatic arc. Though a mélange rock sample has not been found in JS-1 Ridge area, there is evidence of an accretionary prism in the area as evidenced by the geometry observed on a new 3D seismic dataset. Based on the structural trend of Meratus (NNE-SSW) coupled with the regional plate boundary understanding, this suggests that both Meratus & JS-1 Ridge are part of the same suture zone between SW Borneo and Paternoster terranes. The gradual age transition observed in the JS-1 Ridge area suggests a southward shift of the magmatic arc during Early Cretaceous to Late Cretaceous times.
4
LUM, J. K. "THE COLONIZATION OF REMOTE OCEANIA AND THE DROWNING OF SUNDALAND." In Genetic, Linguistic and Archaeological Perspectives on Human Diversity in Southeast Asia. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812810847_0011.
Full text
5
Osundina, Adekunle Olayinka, Zulfikar Simatupang, Geovani C. Kaeng, and Sarah Sausan. "Geopressure Prediction in Deepwater Southeast Asia: Case Study from Sundaland Borneo Continental Margin." In SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/176345-ms.
Full text
6
Clark, S. "Regional Tectonics & Structural Framework of Offshore Aceh's Andaman Sub-Basin, Northern Sumatra, Indonesia." In Indonesian Petroleum Association 44th Annual Convention and Exhibition. Indonesian Petroleum Association, 2021. http://dx.doi.org/10.29118/ipa21-g-30.
Full textAbstract:
The three-way collision of the Indo-Australian, Eurasian and Pacific plates have resulted in Southeast Asia being the most tectonically complex region on Earth. This is particularly true for Offshore Aceh’s Andaman Sub-Basin, which has undergone complex late Eocene-Recent evolution. Despite a long history of hydrocarbon exploration and production, data scarcity in the offshore means that the Sub-Basin’s regional tectonics and structural framework have been poorly understood. Pre-1996 2D seismic data were low-fold and low-offset, however the 2019 PGS (NSMC3D) regional 3D survey imaged the entire Cenozoic sequence, enabling the delineation of a high-resolution tectonic framework for the first time. Integration of interpretations drawn from geophysical datasets with a 2019 biostratigraphy study has refined the ages of critical sequence boundaries and advanced the understanding of major structural elements. GEM™, the Geognostics Earth Model, has been used to place these interpretations in a regional tectonic and kinematic context using a series of high resolution plate animations. Andaman Sub-Basin formation initiated in response to the northward motion of India and collision with Eurasia, suturing the West Burma and Sibumasu Terranes through the middle-late Eocene. Continued northward motion of the Indo-Australian Plate resulted in further subduction along the Sunda Trench with associated oblique back-arc extension in present-day onshore and offshore Java and Sumatra. Concurrent rotation of Sundaland, with sinistral strike-slip motion along the Ranong and Khlong Mauri fault zones, resulted in the two rifting phases within the late Eocene (~40Ma) to early Oligocene in the Andaman Sub-Basin. Significant inversion events at 30Ma and 23Ma formed in response to dextral transpression associated with rotational extrusion of Indochina and Sundaland. Rapid subsidence followed the 30Ma inversion, resulting in a switch to post-rift sag and bathyal conditions during which turbidites infilled seabed topography. The onset of dextral strike slip between the West Burma Terrane along the Saigang fault system occurred at ~26Ma, causing transtension in the Andaman Sub-basin that terminated at 23Ma. At approximately 5Ma inversion and toe thrusts developed along the Sub-Basin’s southern margin due to uplift within the Barisan mountains. Refinement of the tectonic model, integrated with updated biostratigraphic and geochemical models, resulted in a revised tectono-stratigraphy for the Andaman Sub-Basin, which provides a predictive depositional model in which paleogeography and structural reactivation can be understood in a regional context.
7
Satyana, A. H. "Ciletuh Subduction, West Java - New Findings, New Problems: Regional Implications to Cretaceous-Paleogene Convergence of Sundaland Margin and Its Petroleum Geology." In Indonesian Petroleum Association 44th Annual Convention and Exhibition. Indonesian Petroleum Association, 2021. http://dx.doi.org/10.29118/ipa21-g-29.
Full textAbstract:
Ciletuh, southwest Java has been well known as one of the places in Java where pre-Tertiary basement rocks are exposed (Verbeek and Fennema, 1896; Duyfjes, 1940; van Bemmelen, 1949; Sukamto, 1975). In plate tectonic point of view, Ciletuh has been known as place outcropping melange complex related to pre-Tertiary oceanic plate subduction (Thayyib et al., 1977). Ciletuh subduction regionally has been linked to the Cretaceous subduction zones of Luk Ulo/Karang Sambung (Central Java) and Meratus Mountains (South Kalimantan) (Hutchison, 1973; Asikin 1974; Hamilton, 1979). Ciletuh subduction however, has not been dated using metamorphic rocks formed in its subduction zone. Its link to Luk Ulo and Meratus subduction zone only based on the presence of melange, which also lacks of data Meanwhile, subduction zones of Luk Ulo and Meratus have been dated and analysed. We herewith present the results of new field studies and various analyses carried out in the last five years of the Ciletuh subduction complex. The indication of Cretaceous subduction has not found from the date measurement, Ciletuh shows Eocene related subduction. Most of the ophiolites were island-arc tholeiitic or island-arc basalt formed in supra-subduction zone. The overlying olistostrome deposits were younger than previously considered and lasted until early/middle Miocene. Some of the basaltic pillowed lava is considered as part of the ophiolite, while the ones at Gunung Badak is more likely a part of the early Miocene Jampang volcanism. Link of Ciletuh to Early Cretaceous subduction of Luk Ulo is not supported by geochronological data. The new knowledge of Ciletuh subduction implies the pre-Tertiary and Paleogene geology of Java, and petroleum prospectivities of the Paleogene objectives of southern West Java. New problems arise and need more field data and analyses to find out the answers.
8
Taufani, L. "Scaling Relationship of Syn-Rift Alluvial-Fluvial Channel System using Outcrop Analogue: Implication and Prediction for Paleogene Reservoir Geobody and Modeling in the Western Sundaland." In Indonesian Petroleum Association 42nd Annual Convention and Exhibition. Indonesian Petroleum Association, 2018. http://dx.doi.org/10.29118/ipa19.g.532.
Full text
9
Bhat, Raj Nath. "Language, Culture and History: Towards Building a Khmer Narrative." In GLOCAL Conference on Asian Linguistic Anthropology 2019. The GLOCAL Unit, SOAS University of London, 2019. http://dx.doi.org/10.47298/cala2019.3-2.
Full textAbstract:
Genetic and geological studies reveal that following the melting of snows 22,000 years ago, the post Ice-age Sundaland peoples’ migrations as well as other peoples’ migrations spread the ancestors of the two distinct ethnic groups Austronesian and Austroasiatic to various East and South–East Asian countries. Some of the Austroasiatic groups must have migrated to Northeast India at a later date, and whose descendants are today’s Munda-speaking people of Northeast, East and Southcentral India. Language is the store-house of one’s ancestral knowledge, the community’s history, its skills, customs, rituals and rites, attire and cuisine, sports and games, pleasantries and sorrows, terrain and geography, climate and seasons, family and neighbourhoods, greetings and address-forms and so on. Language loss leads to loss of social identity and cultural knowledge, loss of ecological knowledge, and much more. Linguistic hegemony marginalizes and subdues the mother-tongues of the peripheral groups of a society, thereby the community’s narratives, histories, skills etc. are erased from their memories, and fabricated narratives are created to replace them. Each social-group has its own norms of extending respect to a hearer, and a stranger. Similarly there are social rules of expressing grief, condoling, consoling, mourning and so on. The emergence of nation-states after the 2nd World War has made it imperative for every social group to build an authentic, indigenous narrative with intellectual rigour to sustain itself politically and ideologically and progress forward peacefully. The present essay will attempt to introduce variants of linguistic-anthropology practiced in the West, and their genesis and importance for the Asian speech communities. An attempt shall be made to outline a Khymer narrative with inputs from Khymer History, Art and Architecture, Agriculture and Language, for the scholars to take into account, for putting Cambodia on the path to peace, progress and development.
10
Septama, E. "Java Volcanic Arc, what lies beneath?" In Indonesian Petroleum Association 44th Annual Convention and Exhibition. Indonesian Petroleum Association, 2021. http://dx.doi.org/10.29118/ipa21-g-257.
Full textAbstract:
Java Island is an active volcanic arc that resides in the southwestern - southern boundary of Sundaland edges. The volcanic arc consists of several volcanism episodes, with a relatively younging trend northward (Late Oligocene to Pleistocene), following the Indo-Australian plates inward migration. In contrast to the prolific neighboring Northwest and Northeast Java Basins in the Northern edges of Java Island; the basin reconstruction and development in the East-West trending depression in median ranges of Java (from Bogor to Kendeng Troughs) are overlooked and lays bare the challenge to the seismic imaging due to the structural complexity of the overthrusted Neogene unit as well as immense Quaternary volcanic eruption covers. On the other hand, oil and gas seepages around the northern and central parts of the Island confirmed the active petroleum generation. Five focused window areas are selected for this study. A total of 1,893 Km sections, 584 rock samples, 1569 gravity, and magnetic data, and 29 geochemical samples (rocks, oil, and gas samples) were acquired during the study. Geological fieldwork was focused on the stratigraphic unit composition and the observable features of deformation products from the outcrops. Due to the scarcity of the Paleogene deposit exposure in the Central-East Java area, the rock samples were also collected from the mud volcano ejected materials in the Sangiran Dome. Both Bogor and Kendeng Troughs are active petroleum systems that generate type II /III Kerogen typical to the reduction organic material derived from transition to the shallow marine environment. The result suggests that these basins are secular from the neighboring basins, The Northwest and Northeast Java Basins, characterized by oxidized terrigenous type III Kerogen. The contrasting subsurface configuration between Bogor and Kendeng Troughs mainly concerns the fold-thrust belt basement involvement and the tectonic shortening effect on the formerly rift basin.