Relevant bibliographies by topics / Stromatolites

Academic literature on the topic 'Stromatolites'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 February 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Stromatolites.'

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 "Stromatolites"

1

Silva, Loreine Hermida da Silva e., Anderson Andrade Cavalcanti Iespa, and Cynthia Moreira Damazio Iespa. "Composição dos estromatólitos estratiformes da lagoa Salgada, Rio de Janeiro, Brasil." Anuário do Instituto de Geociências 31, no. 2 (December 1, 2008): 42–49. http://dx.doi.org/10.11137/2008_2_42-49.

Full text
Abstract:
Lagoa Salgada is situated in the north coast of State of Rio de Janeiro, between the districts of Campos dos Goitacazes and São João da Barra, some 41º00'30" W and 21º54'10"S. In the margins of the lagoon the presence of recent stromatolitic constructions was verified. The stromatolite may be defined as lithifying biosedimentary structure, growing through of sediment blade trapping by the carbonate precipitation as result of microbian organism activity. The aim of this study was to characterize the cyanobacteria assemblage in stratiform stromatolites found on the floor of lagoa Salgada. Within the stratiform stromatolites 21 species of cyanobacteria were found, Microcoleus chthonoplastes (Thuret) Gomont 1892 and Lyngbya aestuarii (Liebman) Gomont 1892 are frequent in these stromatolites. The presence of calcite was observed in the stratiform stromatolites. The filamentous cyanobacteria are responsible for the union and imprisonment of sediment to form the layers in the stromatolites. The skeleton remains of mollusks, foraminifers and ostracod found in the area, work as a source of calcium carbonate and of sediment to structure the stromatolites
APA, Harvard, Vancouver, ISO, and other styles
2

Riding, Robert, Stanley M. Awramik, Barbara M. Winsborough, Karen M. Griffin, and Robert F. Dill. "Bahamian giant stromatolites: microbial composition of surface mats." Geological Magazine 128, no. 3 (May 1991): 227–34. http://dx.doi.org/10.1017/s001675680002207x.

Full text
Abstract:
AbstractSubtidal columnar stromatolites up to 2.5 m high near Lee Stocking Island in the Exuma Cays, Bahamas, have surface mats approximately equally composed of algae and cyanobacteria. The stromatolites are composed of fine–medium oöid and peloid sand. This sediment is supplied to the growing stromatolite surfaces by strong tidal currents which lift grains into suspension and sweep migrating dunes over the columns. The algae include an unidentified filamentous chlorophyte, and numerous diatom species mostly belonging to Mastogloia, Nitzschia and Navicula. The dominant cyanobacteria are two oscillatoriacean species, both probably belonging to Schizothrix. Trapping of sediment is mainly effected by the unidentified chlorophyte which is veneered by epiphytic diatoms. Grains are bound into a mucilaginous mat composed of diatoms and cyanobacteria. Cyanobacteria alone would not be able to trap and bind coarse sediment so effectively in this environment. In being coarse-grained and having a significant eualgal component to their mats, these stromatolites are similar to subtidal columnar stromatolites at Shark Bay, Western Australia. The Lee Stocking stromatolites are physically stressed by high velocity tidal currents and mobile sediment. The Shark Bay stromatolites are stressed by hypersalinity. In both cases stress deters grazers, encrusters and bioeroders. These coarse-grained eualgal stromatolites contrast with micritic and predominantly prokaryotic stromatolites of most Recent marine environments, and are not analogues for most pre-Phanerozoic stromatolites. They appear to be a response to changing stromatolitic mat components in the Cenozoic.
APA, Harvard, Vancouver, ISO, and other styles
3

Douglas, Susanne, Meredith E. Perry, William J. Abbey, Zuki Tanaka, Bin Chen, and Christopher P. McKay. "The structure and chemical layering of Proterozoic stromatolites in the Mojave Desert." International Journal of Astrobiology 14, no. 3 (March 9, 2015): 517–26. http://dx.doi.org/10.1017/s1473550415000026.

Full text
Abstract:
AbstractThe Proterozoic carbonate stromatolites of the Pahrump Group from the Crystal Spring formation exhibit interesting layering patterns. In continuous vertical formations, there are sections of chevron-shaped stromatolites alternating with sections of simple horizontal layering. This apparent cycle of stromatolite formation and lack of formation repeats several times over a vertical distance of at least 30 m at the locality investigated. Small representative samples from each layer were taken and analysed using X-ray diffraction (XRD), X-ray fluorescence (XRF), environmental scanning electron microscopy – energy dispersive X-ray spectrometry, and were optically analysed in thin section. Optical and spectroscopic analyses of stromatolite and of non-stromatolite samples were undertaken with the objective of determining the differences between them. Elemental analysis of samples from within each of the four stromatolite layers and the four intervening layers shows that the two types of layers are chemically and mineralogically distinct. In the layers that contain stromatolites the Ca/Si ratio is high; in layers without stromatolites the Ca/Si ratio is low. In the high Si layers, both K and Al are positively correlated with the presence and levels of Si. This, together with XRD analysis, suggested a high K-feldspar (microcline) content in the non-stromatolitic layers. This variation between these two types of rocks could be due to changes in biological growth rates in an otherwise uniform environment or variations in detrital influx and the resultant impact on biology. The current analysis does not allow us to choose between these two alternatives. A Mars rover would have adequate resolution to image these structures and instrumentation capable of conducting a similar elemental analysis.
APA, Harvard, Vancouver, ISO, and other styles
4

Rakhmanova, А. V. "History of the study of Karelia Paleoproterozoic stromatolites and their display at the Museum of Precambrian Geology, Petrozavodsk." Vestnik of Geosciences 4 (2021): 25–31. http://dx.doi.org/10.19110/geov.2021.4.4.

Full text
Abstract:
The paper deals with the history of stromatolite studies in the Republic of Karelia and the compiling of a stromatolite collection at the Museum of Precambrian Geology, IG, KarRC, RAS, Petrozavodsk. Major stages in the study of Karelia’s Proterozoic stromatolites are presented, changes in the point of view of their origin are assessed and the exposition «Karelia’s and worldwide stromatolites» is described for the first time. Analysis of the history of Karelia’s widespread and accessible stromatolites and a review of the stromatolite collection at the museum are of scientific and educational interest.
APA, Harvard, Vancouver, ISO, and other styles
5

Papineau, Dominic, Jeffrey J. Walker, Stephen J. Mojzsis, and Norman R. Pace. "Composition and Structure of Microbial Communities from Stromatolites of Hamelin Pool in Shark Bay, Western Australia." Applied and Environmental Microbiology 71, no. 8 (August 2005): 4822–32. http://dx.doi.org/10.1128/aem.71.8.4822-4832.2005.

Full text
Abstract:
ABSTRACT Stromatolites, organosedimentary structures formed by microbial activity, are found throughout the geological record and are important markers of biological history. More conspicuous in the past, stromatolites occur today in a few shallow marine environments, including Hamelin Pool in Shark Bay, Western Australia. Hamelin Pool stromatolites often have been considered contemporary analogs to ancient stromatolites, yet little is known about the microbial communities that build them. We used DNA-based molecular phylogenetic methods that do not require cultivation to study the microbial diversity of an irregular stromatolite and of the surface and interior of a domal stromatolite. To identify the constituents of the stromatolite communities, small subunit rRNA genes were amplified by PCR from community genomic DNA with universal primers, cloned, sequenced, and compared to known rRNA genes. The communities were highly diverse and novel. The average sequence identity of Hamelin Pool sequences compared to the >200,000 known rRNA sequences was only ∼92%. Clone libraries were ∼90% bacterial and ∼10% archaeal, and eucaryotic rRNA genes were not detected in the libraries. The most abundant sequences were representative of novel proteobacteria (∼28%), planctomycetes (∼17%), and actinobacteria (∼14%). Sequences representative of cyanobacteria, long considered to dominate these communities, comprised <5% of clones. Approximately 10% of the sequences were most closely related to those of α-proteobacterial anoxygenic phototrophs. These results provide a framework for understanding the kinds of organisms that build contemporary stromatolites, their ecology, and their relevance to stromatolites preserved in the geological record.
APA, Harvard, Vancouver, ISO, and other styles
6

Lambert, M. B. "Stromatolites of the late Archean Back River stratovolcano, Slave structural province, Northwest Territories, Canada." Canadian Journal of Earth Sciences 35, no. 3 (March 1, 1998): 290–301. http://dx.doi.org/10.1139/e97-115.

Full text
Abstract:
Nine stromatolite localities in the Back River volcanic complex occur at the boundary between 2692 Ma felsic dome-flow complexes, marking the latest eruptions of this stratovolcano, and overlying turbiditic sedimentary rocks of the Beechy Lake Group, Yellowknife Supergroup. Stromatolites form lenses isolated within coarse volcanic breccia at margins of felsic dome-flow complexes, and 2 m thick bioherms that extend laterally for hundreds of metres. Thin units contain wavy laminae and open-spaced, linked mounds, which form thin encrustations on breccia blocks, or clusters of mounds with low synoptic relief. Thick successions comprise undulatory, flat laminated dolomite that contains wrinkled wavy laminae, pseudocolumnar forms, and locally elongate, low-relief mounds. These units typically contain millimetre-scale layers of fine volcanic ash at regular intervals, testifying periodic explosive eruptions during deposition of microbial mats. The stromatolites, which are identified by gross morphology and distinctive laminae, are all stratiform types. Carbonate units all occur on the seaward side of the volcanic dome-flow complexes that straddled the shoreline around the volcano. The stromatolites probably represent isolated microbial communities that may have developed around areas of fumarolic (or hydrothermal) activity associated with these domes. Stratigraphy seaward from the domes comprises carbonate-cemented dome-flanking breccia, stromatolitic and oolitic carbonate, pebbly rhyolite volcarenite, carbonaceous mudstones, banded iron formation, and turbidites. Thus the stromatolites mark a local environment where life flourished in an Archean sea that lapped onto active volcanic domes along the shallow flanks of an emergent stratovolcano.
APA, Harvard, Vancouver, ISO, and other styles
7

Brook, George A., A. Cherkinsky, L. Bruce Railsback, Eugene Marais, and Martin H. T. Hipondoka. "14C Dating of Organic Residue and Carbonate from Stromatolites in Etosha Pan, Namibia: 14C Reservoir Effect, Correction of Published Ages, and Evidence of >8-m-Deep Lake During the Late Pleistocene." Radiocarbon 55, no. 3 (2013): 1156–63. http://dx.doi.org/10.1017/s0033822200048062.

Full text
Abstract:
Lacustrine stromatolites are layered accretionary structures formed in shallow water by cyanobacteria. They are a precise indicator of high lake limits and their morphology and structure provide an insight into paleoenvironments of the time. Previous research on lacustrine stromatolites from Etosha Pan in Namibia based on radiocarbon ages of carbonates were close to the limit of the method and did not account for any possible 14C reservoir effect. The ages were used to suggest that the basin was not extensively flooded during the last 40,000 yr. To assess the reservoir effect, the age characteristics of a stromatolite from Poacher's Point were investigated by 14C dating both carbonate and organic residue from samples at different depths in the deposit. The ∼15-cm-diameter stromatolite was separated into 12 zones from the center to the edge and block samples were cut from each zone; the carbonate and residual organic residue were dated separately. The carbonate ages ranged from 34,700 to 24,700 14C yr BP and the organic ages from 15,700 to 2500 14C yr BP. Ages generally increased with increasing distance from the surface of the deposit. We believe that the organic ages are an accurate estimate of the stromatolite's age, while the much older carbonate ages reflect incorporation of old carbon from limestone bedrock and ancient calcrete introduced by stream and spring flow. Excluding the 2 oldest organic ages (15,700 and 13,600 14C yr BP), which may reflect contamination by older organic material washed into the lake during flooding, a linear regression relationship between carbonate and organic ages indicates that the reservoir effect on carbonate ranges up to ∼24,000 14C yr BP but decreases slightly as the true age of the deposit increases. This regression relationship was used to correct 2 finite carbonate ages for stromatolites from Pelican Island obtained in the early 1980s, which together with our new organic age for a stromatolite from Andoni Bay, document a >8-m-deep lake in Etosha Pan during the Late Pleistocene, at and prior to ∼34,000–26,000 cal yr BP. The organic carbon ages from the Poacher's Point stromatolite suggest prolonged lacustrine conditions during the early to middle Holocene (8000–6600 cal yr BP) but not to the extent seen during the Late Pleistocene.
APA, Harvard, Vancouver, ISO, and other styles
8

Hofmann, H. J., and A. Davidson. "Paleoproterozoic stromatolites, Hurwitz Group, Quartzite Lake area, Northwest Territories, Canada." Canadian Journal of Earth Sciences 35, no. 3 (March 1, 1998): 280–89. http://dx.doi.org/10.1139/e97-103.

Full text
Abstract:
Decimetric to metric domal stromatolites with constituent ministromatolites characterize reddish, 13C-enriched dolostones in the Watterson Formation of the Quartzite Lake area west of Hudson Bay. They provide paleontologic support for a correlation with the only other known early Paleoproterozoic stromatolite occurrences in North America: the Kona Formation of Michigan, and the Nash Formation in southern Wyoming. They also are similar to stromatolites in probable coeval Jatulian carbonates in Karelia on the Baltic Shield, and possibly to stromatolites in the Hutuo Group in China.
APA, Harvard, Vancouver, ISO, and other styles
9

Riding, Robert. "Abiogenic, microbial and hybrid authigenic crusts: components of Precambrian stromatolites." Geologia Croatica 61, no. 2-3 (December 25, 2008): 73–103. http://dx.doi.org/10.4154/gc.2008.10.

Full text
Abstract:
Authigenic seafloor carbonate crusts include fenestrate microbialite, thrombolite, and four types here designated Fine-grained Crust, Sparry Crust, Hybrid Sparry Fine-grained Crust, and Sparry Crust plus Coarse Grains. Each of the latter four types includes at least some layered examples that have generally been regarded as stromatolites. Recognition and interpretation of these various deposits assists understanding of stromatolite development. Sparry Crust is common in the Late Archaean-Mesoproterozoic. It includes botryoidal fans and other crystal pseudomorphs, microdigitate stromatolite, dendrite, isopachous laminite, and herringbone calcite. Although differing in primary mineralogy and bedform, these are all characterized by coarse sparry, commonly radial fibrous, fabric and appear light coloured in thin-section. They have commonly been referred to as seafloor cement, although they formed at the open sediment-water interface rather than as void-fills. Two of them in particular, isopachous laminite and microdigitate ‘tufa’, typically form isopachous layers with good vertical inheritance and have been regarded as stromatolites. In contrast to Sparry Crust, Fine-grained Crust has fine-grained (micritic, clotted, peloidal, filamentous) microfabric that appears dark in thin-section, and irregular uneven layering with relatively poor inheritance. Mixed crusts, composed of millimetric alternations of Sparry and Fine-grained crust, are here termed Hybrid Sparry Fine-grained Crust. Sparry Crust with coarse allochthonous grains - here termed Sparry Crust plus Coarse Grains – includes some examples that have been given formal stromatolite names, e.g., Gongylina and Omachtenia. Sparry, Hybrid, and Fine-grained crusts are common components of Precambrian stromatolites. Their relative abundances change through time. Archaean stromatolite fabrics are commonly obscured by recrystallization, but their preserved lamina arrangements suggest that many of them could be composed mainly of Sparry or Hybrid crust. During the Palaeoproterozoic-Mesoproterozoic, Sparry Crust fabrics were common in peritidal stromatolites, whereas Hybrid Crust appears to have dominated large subtidal domes and columns. Fine-grained Crust may not have become generally abundant until the Neoproterozoic, when it commonly formed both stromatolites and thrombolites. Phanerozoic normal marine stromatolites are also typically composed of Fine-grained Crust. Present-day analogues of Sparry Crust fabrics occur in some speleothem, hot spring, and splash-zone marine crusts, and of Fine-grained Crust in lithified microbial mats. Light-dark millimetric alternations of sparry and fine-grained crust that characterize Hybrid Crust have analogues in freshwater stromatolites. Taken together, these comparisons suggest that some Precambrian stromatolites are abiogenic, some microbial, and others are intimate hybrid mixtures of the two, and that - preservation permitting - these varieties can be distinguished using microfabric and lamina criteria.
APA, Harvard, Vancouver, ISO, and other styles
10

Smith, Alan, Andrew Cooper, Saumitra Misra, Vishal Bharuth, Lisa Guastella, and Riaan Botes. "The extant shore platform stromatolite (SPS) facies association: a glimpse into the Archean?" Biogeosciences 15, no. 7 (April 13, 2018): 2189–203. http://dx.doi.org/10.5194/bg-15-2189-2018.

Full text
Abstract:
Abstract. Shore platform stromatolites (SPS) were first noted at Cape Morgan on the south-east African seaboard. Since then they have been found growing discontinuously in rocky peritidal zones along the entire southern African seaboard. They have also been found on the southwest Australian coast, at Giant's Causeway in Northern Ireland, and more recently at Harris on the Scottish Hebridean Atlantic coast. In this paper SPS occurrence and SPS potential as analogues for Precambrian fossil stromatolites, as well as potential stromatolite occurrences in shore platform regions on Mars, are assessed. Sub-horizontal surfaces promote stromatolite development, while tufa develops on cliffs and steep rocky surfaces. Tufa and stromatolites are end members of a spectrum dictated by coastal topography. Extant SPS occur on well indurated shore platforms in high wave energy settings, often around or near headlands. They can be associated with boulder beaches, boulder ridges, storm swash terraces, coastal dunes, and peat bogs. In contrast to other extant stromatolites, SPS are produced primarily by mineral precipitation, although minor trapping and binding stromatolites do occur. From a geological perspective, SPS develop in mildly transgressive siliciclastic settings in various climatic and tidal regimes. We suggest that SPS could be preserved in the geological record as micritic lenses on palaeo-shore platform surfaces. SPS share many features with Precambrian stromatolites and are a valid modern analogue despite the widely different atmospheric and oceanic conditions of the Archean. We suggest that terraces associated with former oceanic or lacustrine flooding surfaces on Mars are potential targets in the search for palaeo-SPS on Mars.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Stromatolites"

1

Feldmann, Markus. "Controls on stromatolite formation : a comparative study of modern stromatolites from the Bahamas with Messinian examples from Southeast Spain /." [S.l.] : [s.n.], 1995. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=11119.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Petroff, Alexander Peter Phillips. "Streams, stromatolites and the geometry of growth." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68996.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2011.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 148-159).
This collection of papers is about recognizing common geometric features in the dynamics shaping diverse phenomena in the natural world. In particular, we focus on two systems which grow in response to a diffusive flux. The first system is a microbial mat which overlays a layer of precipitated mineral. The microbial mat grows in response to the diffusion of nutrients while the mineral layer grows in response to the precipitation of dissolved ions which diffuse through the microbial mat. The second system is a network of streams that are fed by groundwater. In this case, groundwater flows through the aquifer and into the streams along the gradient of the pressure field, which, at equilibrium, diffuses through the aquifer. Here we show how a quantitative understanding of the shapes and scales of these two systems can be gained from physical and mathematical reasoning with few assumptions. We begin by considering the physical dimensions of systems shaped by diffusion. Guided by field observation and laboratory experiments of microbial mats, we identify two time scales important to the growth of these mats. We show how these processes shape the mat over different length scales and how these length scales are recognizable in the geometry of the mat. Next, we consider the shape of an interface growing in response to a diffusive flux. In microbial mats and streams, resources are focused toward regions of high curvature. We find that curvature-driven growth accurately predicts the shape of both fossilized microbial mats called stromatolites and the the landscape around a spring. Finally, we consider the geometric forms that arise when competition is mediated by diffusion. In particular, we show that when a growing stream bifurcates, competition between the nascent streams cause them to grow apart at an equilibrium angle of [alpha] = 2[pi]/5. The measured bifurcation angles of streams in a kilometer-scale network are in close agreement with this prediction.
by Alexander Peter Phillips Petroff.
Ph.D.
APA, Harvard, Vancouver, ISO, and other styles
3

Davis, Burton S. "Stromatolites in the upper lacustrine unit of the Paleocene Hanna Formation, Hanna Basin, south-central Wyoming." Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1136088711&sid=2&Fmt=2&clientId=18949&RQT=309&VName=PQD.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Jabro, Nicholas Berman. "Microcosm studies of nutrient cycling in Bahamian stromatolites." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8594.

Full text
Abstract:
Thesis (M.S.) -- University of Maryland, College Park, 2008.
Thesis research directed by: Marine, Estuarine, Environmental Sciences Graduate Program. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
APA, Harvard, Vancouver, ISO, and other styles
5

Casanova, Joël. "Les Stromatolites continentaux paléo-écologie, paléohydrologie, paléoclimatologie, application au Rift Gregory." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375965168.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

De, Wever Alexis. "Étude de la biominéralisation de carbonates intracellulaires et de silicates de magnésium hydratés dans des environnements lacustres alcalins." Electronic Thesis or Diss., Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2019SORUS480.pdf.

Full text
Abstract:
Les stromatolites sont des roches organo-sédimentaires laminées composées de carbonates de Ca et/ou Mg mais également de silicates de Mg dans certains cas. Les processus impliqués dans leur formation restent encore mal compris. L’objectif central de cette thèse est de mieux comprendre les processus géochimiques et géomicrobiologiques permettant de favoriser ou au contraire de défavoriser la formation des carbonates et silicates de magnésium dans les environnements lacustres alcalins mexicains. Deux axes principaux ont été développés. Le premier axe s’est focalisé sur les analyses de souches formant des carbonates de calcium amorphes (ACC) intracellulaire (ACC+) ou non. Une grande diversité de souches de cyanobactéries a été analysée pour leur capacité à incorporer le Ca. De plus, l’impact des alcalino-terreux sur la croissance de certaines de ces souches a été déterminé. A partir de cette étude, nous avons mis en évidence que les souches de cyanobactérie ACC+ incorporent plus de Ca que les autres et qu’elles le stockent principalement dans les inclusions d’ACC et dans les polyphosphates (polyP). De plus, nous avons déterminé que les souches ACC+ ont relativement plus besoin de Ca pour leur croissance et certaines d’entre elles sont capables de substituer le Ca par du Sr et Ba. Nous proposons que les inclusions d’ACC 1) peuvent servir de ballasts, 2) peuvent tamponner le pH intracellulaire et équilibrer la formation d'hydroxyde par conversion de HCO3 en CO2 lors de la fixation du carbone et 3) alternativement, ils peuvent servir de forme de stockage de carbone inorganique disponible pour les cellules sur des périodes limitées en C. De plus, les polyP pourraient être impliqués dans le stockage de Ca. Plus largement, les cyanobactéries ACC+ pourraient favoriser la dissolution de carbonate de Ca et par extension celle des stromatolites. Le second axe s’est intéressé à l’étude de la formation de silicates de magnésium dans les sédiments et mésocosmes analogues de 3 lacs alcalins mexicains mais également par des expériences de biominéralisation. Les analyses minéralogiques et chimiques des silicates de magnésium ont été couplées aux caractérisations géochimiques des solutions. L’étude des sédiments a montré la formation de deux smectites, l’une pauvre et l’autre riche en Al et également de smectite ferrugineuse ou sans forte teneur en Fe. Plusieurs interprétations ont été proposées quant à leur formation : 1) la dissolution conjointe d’hydromagnésite et des frustules de silice biogénique, 2) elle est héritée de la colonne d’eau, 3) est liée à l’altération des feldspaths dans les sédiments et 4) à la biominéralisation dans la colonne d’eau. Il a également été montré qu’une souche de cyanobactéries est capable d’induire la précipitation de silicates de magnésium en milieu non tamponné. Dans les mésocosme des lacs alcalins, la formation de silicate de Mg serait directement liée à la composition minéralogique des microbialites, et possiblement des diatomées permettant l’apport de Si dans la solution et localement dans le biofilm, et est biologiquement influencée par les EPS des communautés microbiennes
Stromatolites are laminated organo-sedimentary rocks composed of Ca and/or Mg carbonates but also Mg-silicates in some cases. The processes involved in their formation are still poorly understood. The main goal of this thesis was to better understand the geochemical and geomicrobiological processes that favor the formation or dissolution of carbonates and Mg-silicates in Mexican alkaline lacustrine environments. Two main axes have been developed. The first axis focused on the study of 52 cyanobacterial strains, some forming ACC intracellular, others not forming ACC. The strains were analyzed for their ability to incorporate Ca. The impact of alkaline earth elements on the growth of some of the strains was determined. In this study we have shown that ACC+ cyanobacterial strains incorporate more Ca than others and they store this Ca strongly in ACC and in polyP. In addition, we determined that ACC+ strains need more Ca for their growth and some of them are capable to substitute Ca by Sr and Ba for this purpose. We propose that ACC inclusions 1) can serve as ballasts, 2) can buffer intracellular pH and balance the formation of HCO3 conversion hydroxide to CO2 during carbon fixation and 3) available inorganic carbon storage for carbon dioxide. In addition, polyP could be involved in Ca storage. More broadly, ACC+ cyanobacteria have contributed to the dissolution of calcium carbonate and by extension stromatolites. The second axis focused on the study of Mg-silicate formation in sediments and mesocosms of 3 Mexican alkaline lakes but also in laboratory experiments. Mineralogical and chemical analyzes of magnesium silicates have been coupled with geochemical characterization of the solutions. The study of sediments showed the formation of an Al-low and an Al-rich stevensite-like phase and of ferrous or non-ferrous saponite-like. Several interpretations have been proposed regarding their formation: 1) dissolution of hydromagnesite and biogenic silica frustules, 2) it is inherited from the water column, 3) it is related to the alteration of feldspaths within sediments and 4) biomineralization in the water column. It has also been shown that a cyanobacterial strain was able to induce precipitation of magnesium silicates in an unbuffered medium. Mg-silicate formation in mesocosms from alkaline lakes is thought to be directly related to the mineralogical composition of microbialites, and possibly diatoms that allow Si to be introduced into the solution and locally into the biofilm and is biologically influenced by microbial community EPS
APA, Harvard, Vancouver, ISO, and other styles
7

Guirdham, Claire. "Regional stratigraphy, lithofacies, diagenesis and dolomitisation of microbial carbonates in the Lower Carbonifereous, West Lothian Oil-Shale Formation." Thesis, University of East Anglia, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266732.

Full text
Abstract:
The Dinantian West Lothian Oil-Shale Formation of the Midland Valley, Scotland, is a laterally variable lacustrine sequence, deposited in an overall humid climatic period. The sequence comprises non-marine limestones, dolostones, oil-shales, mudrocks and deltaic sandstones. Thin marine bands and the thick freshwater Burdiehouse Limestone are the most reliable stratigraphic markers. Eight individual outcrops of microbial carbonatesa, ll stratigraphically close to the Burdiehouse Limestone, are correlatable, and therefore important in helping to clarify the Asbian stratigraphy of the eastern Midland Valley of Scotland. The microbial carbonates were deposited in varied shallow lake settings. Lake waters had a long residence time, suggested by fairly positive stable carbon and oxygen isotope ratios. Petrography and geochemistry suggest the primary carbonate was high-Mg calcite. Isotopic variations are mainly controlled by depositional water depth, diagenetic fluid temperaturesl,o calised magmatica ctivity and in-situ organicm atterd ecay. A regional dolornitisation event affected the lithologies, with high Fe" and Mg2+ concentrations suggesting early diagenetic dolomitisation under phreatic conditions. High Sr dolomite suggestst hat the lake and / or regional groundwaters were Sr enriched. Both the Sr ions and the Mg ions for dolomitisation were probably derived from chemically-enriched, seaward flowing groundwaters, that originated on a westerly situated volcanic plateau. The microbial carbonates represent regional and localised regressive sequences, lake, and in volcanically-isolated depositional sub-basins. The carbonates probably correspond to a regionally-significant period of aridity within the Asbian of south-east Scotland, similar to fluctuating seasonal semi-arid and humid conditions identified in the Dinantian of England and Wales.
APA, Harvard, Vancouver, ISO, and other styles
8

Evans, Alexander Joseph. "Characteristics of cone-forming cyanobacteria and implications for the origin of conical stromatolites." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84913.

Full text
Abstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 55-57).
Dating back to 3.5 Gya, stromatolites, which are composed of laminated and lithified carbonate rock, may contain the earliest records of phototaxis, photosynthesis, and oxygenation of the environment. The reconstruction of the co-evolution of biology and the environment using stromatolites depends on the ability to recognize macroscopic shapes that arise uniquely as a consequence of microbial processes. Our investigation aims to understand the biological factors in the formation of conical structures and stromatolites. To elucidate the role of the cyanobacteria, we enrich cyanobacteria from modern hot-spring communities of cone-forming microbes and subsequently test how the formation of conical structures depends on individual strains of the community. In our analysis, we augment morphological identification by genomic analyses of the 16S ribosomal DNA. Through a combination of mixing isolated heterotrophic bacteria and enriched filamentous cyanobacteria communities, we find that heterotrophic bacteria are a determinative factor in the formation and morphology of conical structures. Further, our experiments show the mere presence of a thin, filamentous cone-forming cyanobacteria phenotype is not a sufficient condition for cone formation.
by Alexander Joseph Evans.
S.M.
APA, Harvard, Vancouver, ISO, and other styles
9

Myers, Elise McKenna. "Complex lipids in microbial mats and stromatolites of Hamelin Pool, Shark Bay, Australia." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/114126.

Full text
Abstract:
Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 44-50).
Stromatolites, columnar rock-like structures, are potentially some of the oldest, microbially mediated fossils visible in the rock record; if biogenesis is able to be confirmed for these ancient stromatolites, some being greater than 3 billion years old, these ancient stromatolites could be used to demonstrate the microbial community assemblages throughout ancient time. Hamelin Pool, Shark Bay, Australia is an ideal field site for this task, as stromtolites and modern microbial mats coexist and the microbial mats have been shown to contribute to the formation of the stromatolites. Comprehensive lipid biomarker profiles were determined in this study for non-lithified smooth, pustular, and colloform microbial mats, as well as for smooth and colloform stromatolites. Intact polar lipids, glycerol dialkyl glycerol tetraethers, and bacteriohopanepolyols were analyzed via liquid chromatography-mass spectrometry (LC-MS) coupled to a Quadropole Time-of-Flight (QTOF) mass spectrometer, while the previously studied fatty acids (Allen et al., 2010) were analyzed using gas chromatography-mass spectrometry (GC-MS) to prove consistent signatures. From the lipid profiles, sulfate-reducing bacteria and anoxygenic phototrophic bacteria and archaea could be inferred. The presence of the rare 3-methylhopanoids was discovered in a significant portion of the samples, which could add to the characterization of this molecule, which has only been concretely linked to oxygenic conditions for formation. In accordance with Allen et al. in 2010, 2-methyhopanoids were detected, as well as limited signals from higher (vascular) plants. While the lipid profiles for all sediment types were similar, there were some differences that are likely attributable to morphological differences. However, the overall similarities suggest microbial communities can be similar between non-lithified microbial mats and stromatolites.
by Elise McKenna Myers.
S.B.
APA, Harvard, Vancouver, ISO, and other styles
10

Osterhout, Jeffrey T. "Diversity of Microfossils and Preservation of Thermally Altered Stromatolites from Anomalous Precambrian Paleoenvironments." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470753351.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Stromatolites"

1

Stromatolites. Perth, W.A: Western Australian Museum, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Reitner, Joachim, Nadia-Valérie Quéric, and Mike Reich, eds. Geobiology of Stromatolites. Göttingen: Göttingen University Press, 2008. http://dx.doi.org/10.17875/gup2008-235.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Bertrand-Sarfati, Janine, and Claude Monty, eds. Phanerozoic Stromatolites II. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1124-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Riding, Robert, ed. Calcareous Algae and Stromatolites. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-52335-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Joseph, Seckbach, and SpringerLink (Online service), eds. STROMATOLITES: Interaction of Microbes with Sediments. Dordrecht: Springer Science+Business Media B.V., 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Tewari, Vinod, and Joseph Seckbach, eds. STROMATOLITES: Interaction of Microbes with Sediments. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0397-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Denver, Larry E. Paleoenvironmental significance of stromatolites in the Americus limestone member: (Lower Permian, midcontinent, USA). Lawrence, Ks: University of Kansas Paleontological Institute, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Moitra, A. K. Biostratigraphic study of stromatolites and microbiota of Chattisgarh Basin, M.P., India. Calcutta: Director General, Geological Survey of India, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Hua bei gu lu dong nan yuan xin yuan gu dai sheng wu qun. Beijing: Di zhi chu ban she, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

M, Khabarov E., and International Geological Correlation Programme. Project 156 Phosphorites., eds. Fosforitoobrazovanie i stromatolity. Novosibirsk: Akademii͡a︡ nauk SSSR, Sibirskoe otd-nie, In-t geologii i geofiziki, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Stromatolites"

1

McLoughlin, Nicola. "Stromatolites." In Encyclopedia of Astrobiology, 1603–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_1528.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Sokolov, Boris S., and Andrew B. Iwanowski. "Stromatolites." In The Vendian System, 204–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-73972-9_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

McLoughlin, Nicola. "Stromatolites." In Encyclopedia of Astrobiology, 2389–400. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_1528.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Reid, R. Pamela. "Stromatolites." In Encyclopedia of Modern Coral Reefs, 1045–51. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-2639-2_152.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

McLoughlin, Nicola. "Stromatolites." In Encyclopedia of Astrobiology, 1–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-642-27833-4_1528-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

McLoughlin, Nicola. "Stromatolites." In Encyclopedia of Astrobiology, 1–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_1528-3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Winsborough, B. M., J.-S. Seeler, S. Golubic, R. L. Folk, and B. Maguire. "Recent Fresh-Water Lacustrine Stromatolites, Stromatolitic Mats and Oncoids from Northeastern Mexico." In Phanerozoic Stromatolites II, 71–100. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1124-9_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Moore, L. S., and R. V. Burne. "The Modern Thrombolites of Lake Clifton, Western Australia." In Phanerozoic Stromatolites II, 3–29. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1124-9_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Soudry, D., and G. Panczer. "Stromatolic Phosphorites in the Eocene of the Negev (Southern Israel)." In Phanerozoic Stromatolites II, 255–76. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1124-9_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ballarini, L., F. Massari, S. Nardi, and L. Scudeler Baccelle. "Amino Acids in the Pelagic Stromatolites of the Rosso Ammonitico Veronese Formation (Middle-Upper Jurassic, Southern Alps, Italy)." In Phanerozoic Stromatolites II, 279–94. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1124-9_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Stromatolites"

1

Storrie-Lombardi, Michael C., and Stanley M. Awramik. "A sideways view of stromatolites: complexity metrics for stromatolite laminae." In SPIE Optics + Photonics, edited by Richard B. Hoover, Gilbert V. Levin, and Alexei Y. Rozanov. SPIE, 2006. http://dx.doi.org/10.1117/12.679869.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ulmer-Scholle, Dana S. "Stromatolites in the Todilto Formation?" In 56th Annual Fall Field Conference. New Mexico Geological Society, 2005. http://dx.doi.org/10.56577/ffc-56.380.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Awramik, Stanley M., and Kathleen Grey. "Stromatolites: biogenicity, biosignatures, and bioconfusion." In Optics & Photonics 2005, edited by Richard B. Hoover, Gilbert V. Levin, Alexei Y. Rozanov, and G. Randall Gladstone. SPIE, 2005. http://dx.doi.org/10.1117/12.625556.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

C. Kuroda, M., A. M. Carvalho, and A. C. Vidal. "Classification of Stromatolites Using SOM." In 73rd EAGE Conference and Exhibition incorporating SPE EUROPEC 2011. Netherlands: EAGE Publications BV, 2011. http://dx.doi.org/10.3997/2214-4609.20149712.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Bruihler, Sarah, Lindsey Reiners, Tanner Eischen, and Julie K. Bartley. "RELATIONSHIPS BETWEEN MICROSTRUCTURE AND MORPHOLOGY IN LACUSTRINE STROMATOLITES." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-304048.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

"Microbial structure in the Visean deposits of the Ilych river (Northern Urals)." In All-Russia Lithological Meeting «Geology of reefs». Institute of Geology FRC Komi SC UB RAS, 2020. http://dx.doi.org/10.19110/98491-013-134-136.

Full text
Abstract:
The paper presents data on the distribution of microbial formations in the Visean rocks of the Ilych River basin (Northern Urals). They were found to be present in significant numbers only in the Venevian level. Stromatolites were found in the Visean on the Ilych River for the first time.
APA, Harvard, Vancouver, ISO, and other styles
7

Storrie-Lombardi, Michael C., Stanley M. Awramik, and John Nesson. "3D characterization of stromatolites and the emergence of complexity." In Optical Engineering + Applications, edited by Richard B. Hoover, Gilbert V. Levin, Alexei Y. Rozanov, and Paul C. Davies. SPIE, 2008. http://dx.doi.org/10.1117/12.800918.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Lee, Jeong-Hyun, and Robert Riding. "CAMBRO-ORDOVICIAN KERATOSE SPONGE-MICROBIAL ‘KERATOLITE’ CONSORTIA MIMIC STROMATOLITES." In GSA Connects 2021 in Portland, Oregon. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021am-364907.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Mahseredjian, Taleen, Dylan T. Wilmeth, Frank A. Corsetti, Olivia Piazza, and Carie M. Frantz. "INTRA-LAMINATION ISOTOPIC VARIABILITY IN GREEN RIVER FORMATION STROMATOLITES: SIGNIFICANCE FOR STROMATOLITE-BASED PALEOCLIMATE MODELING OF THE EARLY EOCENE CLIMATIC OPTIMUM." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-300883.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Lamérand, Céline, Mathis Petit, Liudmila S. Shirokova, Pascale Bénézeth, Jean-Luc Rols, and Oleg S. Pokrovsky. "Reproducing the Formation of Stromatolites in a Si-Rich Environment." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1407.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Stromatolites"

1

Joseph, Rhawn. Mars: Algae, Lichens, Fossils, Minerals, Microbial Mats, and Stromatolites in Gale Crater. Journal of Astrobiology and Space Science, March 2020. http://dx.doi.org/10.37720/jassr.03082020.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kirkham, R. V. Base metals in upper Windsor [codroy] group oolitic and stromatolitic limestones in the Atlantic provinces. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/120160.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Stromatolites' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography