Artículos de revistas: "Paleobotany"

1

Schmid, Rudolf, A. C. Shukla y S. P. Misra. "Essentials of Paleobotany". Taxon 35, n.º 3 (agosto de 1986): 625. http://dx.doi.org/10.2307/1221956.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Boon, J. J., S. A. Stout, W. Genuit y W. Spackman. "Molecular paleobotany ofNyssaendocarps". Acta Botanica Neerlandica 38, n.º 4 (diciembre de 1989): 391–404. http://dx.doi.org/10.1111/j.1438-8677.1989.tb01371.x.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Nixon, Kevin C. "Paleobotany in cladistics and cladistics in paleobotany: enlightenment and uncertainty". Review of Palaeobotany and Palynology 90, n.º 3-4 (febrero de 1996): 361–73. http://dx.doi.org/10.1016/0034-6667(95)00092-5.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Tiffney, Bruce Haynes. "Conceptual Advances in Paleobotany". Journal of Geological Education 36, n.º 4 (septiembre de 1988): 221–26. http://dx.doi.org/10.5408/0022-1368-36.4.221.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Cârciumaru, Marin. "Neolithic paleobotany of Romania". Cercetări Arheologice 11, n.º 1-2 (2000): 577–81. http://dx.doi.org/10.46535/ca.11.25.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

TANAI, Toshimasa. "Recent progress of angiosperm paleobotany." Journal of Geography (Chigaku Zasshi) 93, n.º 7 (1985): 488–96. http://dx.doi.org/10.5026/jgeography.93.7_488.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Schuster, R. M., Wilson N. Stewart y Gar W. Rothwell. "Paleobotany and the Evolution of Plants". Bryologist 97, n.º 4 (1994): 463. http://dx.doi.org/10.2307/3243920.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Taylor, Thomas N. "Paleobotany and the Evolution of Plants". Review of Palaeobotany and Palynology 44, n.º 1-2 (febrero de 1985): 151. http://dx.doi.org/10.1016/0034-6667(85)90032-6.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Wang, By Ling. "Deciphering the origin of flowering plants". National Science Review 1, n.º 4 (1 de diciembre de 2014): 560–63. http://dx.doi.org/10.1093/nsr/nwu066.

Texto completo

Resumen

Abstract Colorful flowers decorate our planet with their appealing forms, yet their enigmatic evolutionary origin and rapid early diversification have been regarded as the ‘Goldbach conjecture’ of paleobotany. Else Marie Friis is a prominent professor who in 1981 was the first to identify the small angiosperm flowers that changed our perception of ancestral flowers and opened up a new direction in the study of angiosperm evolution. As a foreign member of Chinese Academy of Sciences (CAS), Professor Friis helps strengthen the scholarly communication and cooperation between China and Europe, especially in paleobotany. NSR got the chance to talk to Professor Friis about her research and developments in this field during her last visit to China. Professor Zhonghe Zhou, a paleontologist at the Institute of Vertebrate Paleontology and Paleoanthropology, CAS, joined the interview.

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Weber, Reinhard y Sergio R. S. Cevallos-Ferriz. "Perfil actual y perspectivas de la paleo botánica en México". Botanical Sciences, n.º 55 (25 de abril de 2017): 141. http://dx.doi.org/10.17129/botsci.1458.

Texto completo

Resumen

As n interdisciplinar science, paleobotany-deals with geology and botany. The number of outcrops with fossil plants, in a wide sense, in Mexico surpasses significantly the number -insufficient - of paleobotanist in the country. Following a stratigraphic sequence seven Mexican fossil floras are characterized underlying their research and problematic status. These floras correspond to those of the Matzitzi (Permian) and Santa Clara (Late Triassic) Formations, the Consuelo (Middle Jurassic) Group, the Cerro del Pueblo and Olmos (Late Cretaceous) Formations, and the Ahuehuetes locality and El Cien Formation (Tertiary). Paleobotany has no substitute for the complete understanding of plants, their evolutionary history and extinctions. It gives information about diversity, distribution and interactions that override results obtained on extrapolations based on observations of extant plants and ecosystems. Mexico has a great potential and peculiar geographic location to contribute important paleobotanical information essential for the large synthesis of plant history at a world-wide level.

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Crepet, William L. y Maria A. Gandolfo. "Paleobotany in the Post-Genomics Era: Introduction1,2". Annals of the Missouri Botanical Garden 95, n.º 1 (11 de marzo de 2008): 1–2. http://dx.doi.org/10.3417/2007180.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

Doyle, James A. "Paleobotany, Relationships, and Geographic History of Winteraceae". Annals of the Missouri Botanical Garden 87, n.º 3 (2000): 303. http://dx.doi.org/10.2307/2666190.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Smoot, Edith L. y Thomas N. Taylor. "Paleobotany: Recent developments and future research directions". Palaeogeography, Palaeoclimatology, Palaeoecology 50, n.º 1 (enero de 1985): 149–62. http://dx.doi.org/10.1016/s0031-0182(85)80009-2.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Banks, Harlan P. "Comparative morphology and the rise of paleobotany". Review of Palaeobotany and Palynology 50, n.º 1-2 (febrero de 1987): 13–29. http://dx.doi.org/10.1016/0034-6667(87)90038-8.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Kaliściak, Tomasz. "W poszukiwaniu kwiatu nietoty. „Literatura kopalna” a paleobotanika". Wielogłos, n.º 1 (55) (2023): 17–40. http://dx.doi.org/10.4467/2084395xwi.23.002.17990.

Texto completo

Resumen

In Search of the Nietota Flower. „Fossil Literature” and Paleobotany The article focuses on the issues of paleontology, the science of plant fossils, with particular emphasis on paleobotanical threads devoted to fossil vegetation, which in the 19th century was closely related to philology, represented both by the science of literature and language. The author extracts the notions of “fossil literature” (Adam Mickiewicz) and “fossil poetry” (Ralph Waldo Emerson), pointing to their particular relationship with “paleobotany of the unconscious” (Kazimierz Wyka), presented from the psychoanalytic perspective (Eduard von Hartmann, Carl Gustav Jung, Charles Baudouin) as an archetype of collective, interspecies memory, reaching back to some common ancestor and root cause reminding us of the eternal coexistence of the organic and the inorganic, plant and animal, human and non-human. The author also draws attention to the ecological and ecocritical aspects of the fossil literature, which he perceives as the trace fossils of human life activity (ichnofossils), which make up the meta-layer of the Anthropocene.

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Mohr, Barbara y Annette Vogt. "German Women Paleobotanists From the 1920S to the 1970S—Or Why Did This Story Start So Late?" Earth Sciences History 20, n.º 1 (1 de enero de 2001): 14–43. http://dx.doi.org/10.17704/eshi.20.1.q7643x2308728m56.

Texto completo

Resumen

This study documents women paleobotanists and their achievements from the late 1920s to the early 1970s in Germany. More than forty women were involved in paleobotanical research and related fields during this period. After they had finished their degrees, about two thirds of them left the field for private, political, and/or economic reasons. Several of them, however, had a successful career or were even leaders in their field. Compared with other disciplines and neighbouring countries, the unusually late entry of women students into this discipline from the 1930s on is explained by the close affiliation of the discipline with Paleozoic geology and mining in Germany before 1945. It is significant that of the thirteen women who finished a degree in the field before 1945, about two thirds studied Quaternary pollen analysis and vegetation history. Only a minority was involved in pre-Quaternary paleobotany. After World War II, the number of women scientists increased noticeably only when Tertiary palynology/paleobotany became more important sub-disciplines of paleobotany, a pattern which was similar in both parts of the newly divided country. During the period between 1945 and 1955, the number of women students in West Germany was significantly higher than in the East. This is partly explained by the policies of the East German communist party, which put restrictions on women students from a middle-class background. Between 1955 and 1973 the number of women students in East Germany exceeded those in the West. This was due to the East German party policy of activating the female working force, especially in fields which had been traditionally occupied by men, such as geology, mining, and engineering.

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Matten, Lawrence C., Wilson N. Stewart y Gar W. Rothwell. "Paleobotany and the Evolution of Plants, Second Edition." Bulletin of the Torrey Botanical Club 121, n.º 2 (abril de 1994): 194. http://dx.doi.org/10.2307/2997172.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Crane, Peter R. "Paleobotany and the Evolution of Plants.Wilson N. Stewart". Quarterly Review of Biology 60, n.º 1 (marzo de 1985): 66–67. http://dx.doi.org/10.1086/414192.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Stokstad, E. "PALEOBOTANY: Fossil Plant Hints How First Flowers Bloomed". Science 296, n.º 5569 (3 de mayo de 2002): 821a—821. http://dx.doi.org/10.1126/science.296.5569.821a.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Barale, Georges. "Paleobotany and the evolution of plants. Second edition". Geobios 26, n.º 5 (enero de 1993): 632. http://dx.doi.org/10.1016/0016-6995(93)80045-s.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Tomescu, Alexandru M. F. "Development: Paleobotany at the High Table of Evo–Devo". Current Biology 26, n.º 12 (junio de 2016): R505—R508. http://dx.doi.org/10.1016/j.cub.2016.05.001.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Wing, Scott L. "HIGH-RESOLUTION LEAF X-RADIOGRAPHY IN SYSTEMATICS AND PALEOBOTANY". American Journal of Botany 79, n.º 11 (noviembre de 1992): 1320–24. http://dx.doi.org/10.1002/j.1537-2197.1992.tb13736.x.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Cleal, Christopher y Barry Thomas. "European frameworks for the selection of Palaeozoic paleobotany Geosites". Geologica Balcanica 28, n.º 3-4 (30 de diciembre de 1998): 59–66. http://dx.doi.org/10.52321/geolbalc.28.3-4.59.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Semeler, Alexandre Ribas y Margot Guerra-Sommer. "Dados de pesquisa em paleobotânica: conjunto de dados petrográficos de lâminas delgadas de lenhos fósseis". Encontros Bibli: revista eletrônica de biblioteconomia e ciência da informação 29 (4 de marzo de 2024): 01–12. http://dx.doi.org/10.5007/1518-2924.2024.e95688.

Texto completo

Resumen

Objective: This study was aimed at analyzing and disseminating the fossil wood collection data stored in the thin slide sections of the paleobotany collection of the Department of Paleontology and Stratigraphy of the Institute of Geosciences of a university in Southern Brazil. Thin sheets of petrified wood are described. Research data used in geosciences specifically seek to develop a model for the use of this type of sheet in paleobotany, enabling visualization of its representativeness in studies published over 40 years to obtain the anatomical characteristics of fossil woods and define their systematic affinities as a specific typology of research data in geosciences. Methods: The methodology involved interviewing a paleobotanical specialist and using different techniques applied in metric studies to map scientific production. Thus, a dataset of (20) thin slide sections of petrified fossil wood used in “Stressing environmental conditions in the “petrified forest” from the Mata Sequence in the Triassic context of the Paraná Basin,” a paper published by the Journal of South American Earth Sciences (DOI:10.1016/j.jsames.2023.104415), was used. Depending on the methodology, these thin petrified wood sheets can reveal paleoclimatic signatures based on the anatomical characteristics of the fossil wood. In addition to this case study, which represents a collection of more than (2.000) thousand blades of fossil wood and approximately 40 years of research, the paleobotanical collection of the department is reused in methodology classes. The collection comprises a database created by research physicists that provides information on anatomical features, systematic affinities, paleoclimatic conditions, and paleoenvironmental insights. Potential for reuse: The reuse, registration, storage, identification, and preservation of thin slide sections as a type of research data used in paleobotany aims to improve the methodology associated with the organization of the physical database of the institution. The research data and blades of fossil wood are being digitized, and soon will be available under the CC BY 4.0 license in the ZENODO repository, according to the sample described here in this data paper (DOI Mendeley:10.17632/b8phfcsync.1). Furthermore, the data can be reused in optical and electronic scanning microscopy software.

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Archibald, S. Bruce, Kathleen B. Pigg, David R. Greenwood, Steven R. Manchester, Lisa Barksdale, Kirk R. Johnson, Michael Sternberg, Ruth A. Stockey, Melanie L. DeVore y Gar W. Rothwell. "Wes Wehr dedication". Canadian Journal of Earth Sciences 42, n.º 2 (1 de febrero de 2005): 115–17. http://dx.doi.org/10.1139/e05-013.

Texto completo

Resumen

We dedicate this issue to the memory of Wesley C. Wehr, former Affiliate Curator of Paleobotany, Burke Museum of Natural History and Culture, Seattle, Washington. Wes' contributions to paleontology, particularly in the Okanagan Highlands of Washington State and British Columbia; his influence on a generation of paleontologists (particularly paleobotanists) working in and coming from this region; and his warm friendship that brought together members of the scientific and arts communities were deeply influential, and will be fondly remembered.

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Sprinkel, Douglas, Mary Beth Bennis, Dale Gray y Carole Gee. "Stratigraphic Setting of Fossil Log Sites in the Morrison Formation (Upper Jurassic) near Dinosaur National Monument, Uintah County, Utah, USA". Geology of the Intermountain West 6 (31 de octubre de 2019): 61–76. http://dx.doi.org/10.31711/giw.v6.pp61-76.

Texto completo

Resumen

The outcrop belt of the Upper Jurassic Morrison Formation in the northeastern Uinta Basin and southeastern flank of the Uinta Mountains is particularly rich in dinosaurian and non-dinosaurian faunas, as well as in fossil plants. The discovery of several well-preserved, relatively intact, fossil logs at several locations in Rainbow Draw and one location in Miners Draw, both near Dinosaur National Monument (Utah), has provided an opportunity to study the local paleobotany, stratigraphy, and sedimentology of the Morrison Formation in northeastern Utah.

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Nixon, Kevin C. "Paleobotany, Evidence, and Molecular Dating: An Example from the Nymphaeales". Annals of the Missouri Botanical Garden 95, n.º 1 (11 de marzo de 2008): 43–50. http://dx.doi.org/10.3417/2007063.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Mandang, Y. I., Andianto y H. Oktariani. "Paleobotany collections: fossil woods available at the Bandung Geological Museum". IOP Conference Series: Earth and Environmental Science 948, n.º 1 (1 de diciembre de 2021): 012002. http://dx.doi.org/10.1088/1755-1315/948/1/012002.

Texto completo

Resumen

Abstract Indonesia is a country which has plants species diversity. The form of ancient plants that grew in the past are recorded as fossil woods. Several fossil woods from regions in Indonesia were collected and became exhibition collections at the Bandung Geological Museum. These fossil woods on display requires biology identity to provide more information to visitors. Identification of species of fossil woods were carried out based on the anatomical features on the smoothed cross-section. Observations were carried out by a loop hand (a magnification of 10 times and a digital loop (with a magnification of 16 times). The fossil woods anatomy features observed included vessel cells, parenchyma cells, rays cells, and the presence of resin channels. The fossil specimen which had unclear anatomy features compared by detailed description of wood anatomy available at the library and collections of wood samples owned by the Xylarium Bogoriense. The fossil woods species are Canarioxylon sp., Terminalioxylon sp., Anisopteroxylon sp., Dipterocarpoxylon sp., Dryobalanoxylon sp., Hopenium/Hopeoxylon sp., Shoreoxylon sp., Kompassioxylon sp., and Xanthophyllum sp. The mostly fossil woods species resvectively belonging to the Dipterocarpaceae, Combretaceae, Polygalaceae, Burseraceae, and Leguminosae. The fossil woods member of Dipterocarpaceae family are conspicuously characterized with the presence of resin canals.

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Dilcher, David L. "Paleobotany: some aspects of non‐flowering and flowering plant evolution". TAXON 50, n.º 3 (agosto de 2001): 697–711. http://dx.doi.org/10.2307/1223702.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Graham, Alan. "Studies in Neotropical Paleobotany. IV. The Eocene Communities of Panama". Annals of the Missouri Botanical Garden 72, n.º 3 (1985): 504. http://dx.doi.org/10.2307/2399101.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Burnham, Robyn J. "Patterns in tropical leaf litter and implications for angiosperm paleobotany". Review of Palaeobotany and Palynology 81, n.º 1 (marzo de 1994): 99–113. http://dx.doi.org/10.1016/0034-6667(94)90129-5.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Archangelsky, Sergio. "Aspects of Gondwana paleobotany: gymnosperms of the Paleozoic—Mesozoic transition". Review of Palaeobotany and Palynology 90, n.º 3-4 (febrero de 1996): 287–302. http://dx.doi.org/10.1016/0034-6667(95)00088-7.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Aipeisova, S. A., N. A. Utarbayeva y E. T. Kazkeev. "On the issue of the history of the formation of the flora of the Aktobe floral district". BULLETIN of the L.N. Gumilyov Eurasian National University. BIOSCIENCE Series 146, n.º 1 (2024): 20–38. http://dx.doi.org/10.32523/2616-7034-2024-146-1-20-38.

Texto completo

Resumen

The question of the origin and history of flora formation is one of the most important areas of botanical and geographical research. The solution of this issue is possible only on the basis of materials from paleobotany, paleogeography, paleogeology, phytostratigraphy, paleoclimatology, paleontology, as well as the identification and study of relict plant species of flora. The purpose of the work is to consider the main stages of the genesis of the flora of the Aktobe floral district. The urgency of the problem is due to the need to develop theoretical problems of phlorogenesis and phytocenogenesis and to reflect them on a specific regional material. The work was carried out on the basis of literature data on the genesis of flora, geomorphology and climatology, as well as on long-term herbarium materials collected by us using the route method. The analysis of the areas of relict species of the study area demonstrates the pronounced connections of flora with the forest, forest-steppe, steppe zones of Europe, Siberia, the Turan deserts, mountainous Central Asia, as well as the presence of certain connections with the Caucasus, the Mediterranean and once again confirms the duality of the nature of the steppes: on the one hand from the light-tolerant species of the Arctic-tertiary root, and on the other the sides are from the ancient Mediterranean". The study of materials on paleobotany, paleogeography, paleogeology, phytostratigraphy, paleoclimatology and the analysis of relics reflect the complexity and heterogeneity and heterochronicity of the process of florogenesis of the Aktobe floristic district.

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Gross, W. y H. P. Schultze. "Zur Geschichte der Geowissenschaften im Museum für Naturkunde zu Berlin. Teil 6: Geschichte des Geologisch-Paläontologischen Instituts und Museums der Universität Berlin 1910–2004". Fossil Record 7, n.º 1 (1 de enero de 2004): 5–43. http://dx.doi.org/10.5194/fr-7-5-2004.

Texto completo

Resumen

Die Entwicklung des Geologisch-Paläontologischen Instituts und Museums der Universität Berlin von einer Institution, die Geologie zusammen mit Paläontologie als eine Einheit vertrat, über eine Institution, die eine geotektonische Ausrichtung hatte, zu einer auf Paläontologie konzentrierten Institution wird nachvollzogen. Die beiden Institutsdirektoren am Anfang des 20sten Jahrhunderts waren Vertreter der allumfassenden Geologie des 19ten Jahrhunderts, während die beiden folgenden Direktoren eine Geologie ohne Paläontologie vertraten. Das führte zu einer Trennung der beiden Richtungen, und nach der III. Hochschulreform der DDR 1968 verblieb allein die sammlungsbezogene Paläontologie am Museum. Nach der Wiedervereinigung wurde ein Institut für Paläontologie mit biologischer Ausrichtung mit zwei Professuren, einer für Paläozoologie und einer für Paläobotanik, eingerichtet. <br><br> The development of the Geologisch-Paläontologisches Institut und Museum of the Museum für Naturkunde at the Humboldt University (formerly Friedrich-Wilhelm-Universität) in Berlin from a geology-paleontology institution to a pure paleontology institution is described. The first two directors of the department in the beginning of the 20th century, Prof, von Branca and Prof. Pompeckj, represented a 19th century concept of a geology, which included paleontology, even vertebrate paleontology as the crown jewel of geology. They fought sometimes vigorously against a separation of paleontology from geology. The next two directors. Prof. Stille and Prof, von Bubnoff, were the leading geologists in Germany; to be a student of Stille was a special trade mark in geology of Germany. They represented a geology centered on tectonics. The separation of paleontology as separate section was prepared. The destructions of the Second World War, the following restaurations and the division of Germany into two States influenced strongly their directorships. The education of geologists at the Museum für Naturkunde ended with the III. University Reform of the German Democratic Republik in 1968. Paleontology was represented by the international renown vertebrate paleontologist, Prof. Dr. W. Gross, up to 1961. Since 1969, paleobotany was strengthened by the inclusion of the paleobotany unit of the Akademie der Wissenschaften into the museum. After reunification of Germany n 1990, the department was rebuild as a Institut für Palaontologie with close connection to biology, a unique situation in Germany. Two professorships, one for paleozoology, Prof. Schultze. and one for paleobotany, Prof. Mai, were established. The number of curators increased to ten from one under the first director of the 20th century. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.20040070103" target="_blank">10.1002/mmng.20040070103</a>

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Melchior, Robert. "Paleobotany of the Paleocene St. Stephens site, Berkeley County, South Carolina". Paleontological Society Special Publications 6 (1992): 209. http://dx.doi.org/10.1017/s2475262200007693.

Texto completo

Resumen

Plant fossils including silicified wood, amber and a diverse suite of palynomorphs were recovered from beds of the Rhems and Williamsburg Formations of the Black Mingo group. The Rhems beds are Danian in age and the Williamsburg is Thanetian. Both formations constitute prograding delta sequences. The palynomorph assemblage was recovered from the Rhems Formation and consists of 112 species of pollen and spores of angiosperms, gymnosperms and cryptogams as well as 32 species of fungal spores. Silicified wood represents 10 taxa and the amber is suggestive of two but precise stratigraphic position of these latter fossils is uncertain.An analysis of the ranges of palynomorph taxa within the Rhems Formation yields three assemblages. An assemblage concentrated in the lower, pro-delta beds of the unit is felt to represent a coastal community, a group concentrated in the upper delta-front and topset beds is representative of an inland assemblage and a third group ranges throughout the section. The coastal assemblage is dominated by palms with gymnosperms also being abundant. The inland assemblage consists primarily of a diverse array of dicots associated with the Normapolles group. The long ranging assemblage is associated with both the above groups in about equal numbers. A habitat mosaic consisting of xeric to mesic and hydric elements within the coastal and inland community zones is inferred. Analysis using the modern affinities of the palynomorphs suggests a subtropical, summer dry climate near its meteorological boundary with the tropical zone such as that found in parts of coastal southeast Asia today.Wood taxa from the site include specimens assignable to Podocarpoxylon, Myrica, Fagaceaoxylon, Magnoliaeoxylon, Ulminium, Liquidambar, Nyssoxylon, the Olacaceae, Apocynaceae and possibly the Icacinaceae. Calculated “V” values and anatomical details of these woods correlate well with the habitat mosaic and paleoclimatic implications suggested by the palynomorphs.Infra-red spectra of the ambers suggest affinities of these fossils with the Caesalpiniaceae and the Araucariaceae. Pollen that might be attributable to these groups includes Margocolporites, Rhoipites, and Classopollis (Pagiophyllum).The fungal palynomorphs are both abundant and diverse in some samples from the site. These fossils include both hyphae and conidia in place in the silicified wood and dispersed spores.

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Wilf, Peter, Scott L. Wing, Herbert W. Meyer, Jacob A. Rose, Rohit Saha, Thomas Serre, N. Rubén Cúneo et al. "An image dataset of cleared, x-rayed, and fossil leaves vetted to plant family for human and machine learning". PhytoKeys 187 (16 de diciembre de 2021): 93–128. http://dx.doi.org/10.3897/phytokeys.187.72350.

Texto completo

Resumen

Leaves are the most abundant and visible plant organ, both in the modern world and the fossil record. Identifying foliage to the correct plant family based on leaf architecture is a fundamental botanical skill that is also critical for isolated fossil leaves, which often, especially in the Cenozoic, represent extinct genera and species from extant families. Resources focused on leaf identification are remarkably scarce; however, the situation has improved due to the recent proliferation of digitized herbarium material, live-plant identification applications, and online collections of cleared and fossil leaf images. Nevertheless, the need remains for a specialized image dataset for comparative leaf architecture. We address this gap by assembling an open-access database of 30,252 images of vouchered leaf specimens vetted to family level, primarily of angiosperms, including 26,176 images of cleared and x-rayed leaves representing 354 families and 4,076 of fossil leaves from 48 families. The images maintain original resolution, have user-friendly filenames, and are vetted using APG and modern paleobotanical standards. The cleared and x-rayed leaves include the Jack A. Wolfe and Leo J. Hickey contributions to the National Cleared Leaf Collection and a collection of high-resolution scanned x-ray negatives, housed in the Division of Paleobotany, Department of Paleobiology, Smithsonian National Museum of Natural History, Washington D.C.; and the Daniel I. Axelrod Cleared Leaf Collection, housed at the University of California Museum of Paleontology, Berkeley. The fossil images include a sampling of Late Cretaceous to Eocene paleobotanical sites from the Western Hemisphere held at numerous institutions, especially from Florissant Fossil Beds National Monument (late Eocene, Colorado), as well as several other localities from the Late Cretaceous to Eocene of the Western USA and the early Paleogene of Colombia and southern Argentina. The dataset facilitates new research and education opportunities in paleobotany, comparative leaf architecture, systematics, and machine learning.

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Graham, Alan. "Studies in Neotropical Paleobotany. IX. The Pliocene Communities of Panama-Angiosperms (Dicots)". Annals of the Missouri Botanical Garden 78, n.º 1 (1991): 201. http://dx.doi.org/10.2307/2399606.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Stukalova, I. E., Т. А. Sadchikova, S. V. Naugolnykh y А. L. Chepalyga. "Gagates in Crimean middle jurassic sediments (Sudak): coal petrography, paleobotany, formation conditions". Proceedings of higher educational establishments. Geology and Exploration, n.º 4 (8 de diciembre de 2023): 46–65. http://dx.doi.org/10.32454/0016-7762-2023-65-4-46-65.

Texto completo

Resumen

Background. The coal-bearing deposits of the Kopsel formation of the Bathonian-Callovian age of the Middle Jurassic near the city of Sudak (Crimea) are studied. The conducted lithological and mineralogical analysis of rocks, mainly sandstones and siltstones, with shell detritus, plant residues and coal lenses (gagates), made it possible to determine the coastal-marine and lagoon sedimentation conditions. The studied gagates are represented by structural vitrinite and belong to the humus group. Secondary minerals in coal seams and host rocks indicate the stage of early catagenesis. The botanical analysis revealed the coal-forming plants, belonging to a group of conifers of the araucaria family.Aim. To identify the facies-climatic and landscape conditions for the formation of gagates of the Kopsel formation, along with their composition, structure, and secondary changes. To demonstrate that the material composition of coals is the wood of gymnosperms, mainly conifers, rather than algal thalli.Materials and methods. The natural outcrops of the coal-bearing deposits of the Middle Jurassic of the Bathonian-Callovian stage of the Kopsel formation in the valley of the Kopsel River near the city of Sudak (Crimea) were studied. The lenses and interlayers of brown coal — gagate — present in these deposits were of particular interest. Gagate samples were studied both macroscopically (forms and occurrence conditions in the section) and microscopically (by coal petrography methods). To this end, double-sided polished sections were examined using a polarizing microscope and a Vega3 Tescan scanning microscope. The microanalysis of chemical elements was performed using an ULTM Max (GIN) microscope attachment. Paleobotanical studies of carbonified plant residues were carried out. The structure, texture and mineral composition of the rocks were studied in thin sections using a microscope. A mineralogical analysis was carried out using a D8 Advace X-ray diffractometer (gross composition in a powder diffractogram and composition of clays in a fraction of <0.001 mm) and a Vega3 Tescan (GIN) scanning microscope.Results. The comprehensive studies conducted in the new, unique location of coals in the Kopsel Formation of the Middle Jurassic (Bathonian-Callovian stage) in the valley of the Kopsel River determined the paleobotanical composition of coal-forming plants (with the predominance of conifers of the Araucariaceae type), the climatic and paleolandscape conditions for the formation of these coals on the northern outskirts of Tethys. The lithological and mineralogical features of rocks, mainly sandstones and siltstones, with shell detritus, plant residues and lenses of coals (gagates), make it possible to determine the facies conditions of sedimentation as coastal-marine and lagoonal, with fragments of avantdelta and proluvial, landslide deposits. The established secondary changes in the host rocks and the coals indicate the stage of early catagenesis, to which the stratum was subjected at the next stages of geological history.Conclusion. Peat accumulation and subsequent coal formation most likely occurred in shallow lagoons. The type of peat accumulation is paralytic, paragenetically related to the studied sediments. Post-sedimentation transformations of the rocks correspond to early catagenesis. These transformations were established by the presence of secondary calcite (by rock cracks and in the form of nodule formations), the abundance of authigenic gypsum, and the widespread replacement of pyrite framboids with iron oxide minerals. The interlayers of gagates have also undergone changes. In those places where organic matter is impregnated with carbonate solutions, the coal substance is exposed to heat, thus becoming optically opaque.

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

King, Olivia Anne, Randall F. Miller y Matt Ryan Stimson. "Ichnology of the Devonian (Emsian) Campbellton Formation, New Brunswick, Canada". Atlantic Geology 53 (8 de febrero de 2017): 001–15. http://dx.doi.org/10.4138/atlgeol.2017.001.

Texto completo

Resumen

The Campbellton Formation has long been known to yield a fossil assemblage of Devonian (Emsian) fish and eurypterids at its westernmost exposure near Campbellton and Atholville, and a well described flora and early land animal fauna toward its easternmost exposure near Dalhousie Junction. Although the body fossil assemblage (paleobotany, vertebrate and invertebrate paleontology), paleoecology and paleoenvironmental context of the formation have been extensively studied, ichnofossils are rare and have not been described previously. Fossils from the vertebrate and eurypterid bearing ‘Atholville Beds’ contain a low diversity ichnofossil assemblage represented by three ichnotaxa:Monomorphichnus, ?Taenidium and Helminthoidichnites. Monomorphichnus is proposed here as being produced by the produced by the activity of the eurypterid Pterygotus anglicus.

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

Ryberg, Patricia E., Carla J. Harper y Anne-Laure Decombeix. "Celebrating Women in Paleobotany: A Tribute to Edith L. Taylor—Introduction and Dedication". International Journal of Plant Sciences 182, n.º 6 (1 de julio de 2021): 415–17. http://dx.doi.org/10.1086/714608.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Phillips, David A. y Robert C. Euler. "The Archaeology, Geology, and Paleobotany of Stanton's Cave: Grand Canyon National Park, Arizona". American Antiquity 52, n.º 1 (enero de 1987): 208. http://dx.doi.org/10.2307/281087.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Sanders, Roger y Steven Austin. "Paleobotany supports the floating mat model for the origin of Carboniferous coal beds". Proceedings of the International Conference on Creationism 8, n.º 1 (2018): 525–52. http://dx.doi.org/10.15385/jpicc.2018.8.1.39.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Herman, Aleksei Borisovich. "Paleobotany and the Earth’s climate: Looking into the Future from the geological past". Herald of the Russian Academy of Sciences 79, n.º 3 (junio de 2009): 217–24. http://dx.doi.org/10.1134/s1019331609030034.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Graham, Alan. "Studies in Neotropical paleobotany. XIII. An Oligo-Miocene palynoflora from Simojovel (Chiapas, Mexico)". American Journal of Botany 86, n.º 1 (enero de 1999): 17–31. http://dx.doi.org/10.2307/2656951.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Gaignerot-Driessen, Florence. "Donald C. Haggis and Carla M. Antonaccio (eds). Classical Archaeology in Context: Theory and Practice in Excavation in the Greek World." Journal of Greek Archaeology 2 (1 de enero de 2017): 429–32. http://dx.doi.org/10.32028/jga.v2i.607.

Texto completo

Resumen

This volume is a collective, multi-regional, multi-period, and multi-disciplinary reflexion on what is and what should be classical archaeology. The 13 contributions collected are organised in four chapters, respectively paying attention to ‘historical contexts and intellectual traditions’, ‘mortuary’, ‘urban and rural’, and ‘sanctuary contexts’. The study cases presented come from Crete (Praisos, Azoria, and Arkalochori), Rhodes (Kymissaleis), Lycia (Çaltılar Höyük), Macedonia (Platania, Kompoloi, Douvari, Krania, and Vergina), the Peloponnese (Argos, Elis, Megalopolis and the island of Poros), Attica (Athens, Vourva, Marathon), and Sicily (Morgantina). The papers consider archaeological contexts dated from the Geometric to the Hellenistic period. A wide range of archaeological specializations, such as ceramology or bioarcheology (paleobotany, archeozoology, physical anthropology), and technologies (photogrammetry, interrelational database, tomography, geophysical survey, INAA, petrography, pXRF), is represented and discussed by the different contributors.

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Derevianko, A. P. "Findings from the Paleolithic Studies in Siberia". Archaeology, Ethnology & Anthropology of Eurasia 51, n.º 1 (6 de abril de 2023): 3–17. http://dx.doi.org/10.17746/1563-0110.2023.51.1.003-017.

Texto completo

Resumen

It was long believed that Siberia with its harsh environment and climate had been peopled by humans rather late, and that the culture of early Siberian hominins was primitive. Wide-ranging discoveries of the last 3–4 decades, carried out by archaeologists of Siberia, especially those from the Institute of Archaeology and Ethnography SB RAS in Novosibirsk, with the participation of experts in other disciplines such as geology, geochronology, paleontology, paleobotany, genetics, etc., indicate very early dates of the initial peopling of Siberia and a new taxon, H. s. altaiensis, which is associated with one of the most interesting cultures in Eurasia and, along with the earliest anatomically modern African humans, H. s. neanderthaliensis, and H. s. orientalensis, had participated in the origins of anatomically modern H. s. sapiens.

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

JIJINA, ANTHONY P., ELLEN D. CURRANO y KURT CONSTENIUS. "THE PALEOBOTANY AND PALEOECOLOGY OF THE EOCENE HERREN BEDS OF NORTH-CENTRAL OREGON, USA". PALAIOS 34, n.º 9 (20 de septiembre de 2019): 424–36. http://dx.doi.org/10.2110/palo.2019.014.

Texto completo

Resumen

ABSTRACT New collections of plant macrofossils and radiometric dates from the Herren beds of north-central Oregon provide the opportunity to document floral communities and calculate foliar-derived climate estimates from the warm early Eocene and the cooler middle Eocene. Plant macrofossils were collected from one fluvial site at East Birch Creek approximately 2 m below a 51.9 ± 0.9 Ma tuff. Collections were also made at two co-occurring fluvial sites at Arbuckle Mountain, whose ages are constrained to ca. 44.5–43.8 Ma based on a dated tuff from Willow Creek (44.5 ± 0.8 Ma) and reported ages for the overlying Clarno Formation. Floral findings show an almost complete vegetation overturn, with only two genera (Glyptostrobus and Allantodiopsis) appearing in both floras. Both floras are species poor, but the older East Birch Creek flora has higher richness and evenness than the younger Arbuckle Mountain flora. The four named genera at East Birch Creek are taxa found throughout Eocene North America; named genera at Arbuckle Mountain also include taxa restricted to the Pacific Northwest. Leaf margin analysis and leaf area analysis of the East Birch Creek community suggest a warmer and possibly wetter (mean annual temperature 23.4 ± 4.3 °C; mean annual precipitation 206 +89, -63 cm) climate than the Arbuckle Mountain flora (16.4 ± 4.2 °C; 165 +50, -71.4 cm). This research provides a framework for future research on Eocene floristic, environmental, and climatic trends of the Pacific Northwest.

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Graham, Alan. "Studies in Neotropical Paleobotany. V. The Lower Miocene Communities of Panama-The Culebra Formation". Annals of the Missouri Botanical Garden 75, n.º 4 (1988): 1440. http://dx.doi.org/10.2307/2399295.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Graham, Alan. "Studies in Neotropical Paleobotany. VI. The Lower Miocene Communities of Panama-the Cucaracha Formation". Annals of the Missouri Botanical Garden 75, n.º 4 (1988): 1467. http://dx.doi.org/10.2307/2399296.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Escapa, Ignacio H., Alexandru M. F. Tomescu, Michael T. Dunn y Ruth A. Stockey. "Integrative Paleobotany: Affirming the Role of Fossils in Modern Plant Biology—Introduction and Dedication". International Journal of Plant Sciences 180, n.º 6 (julio de 2019): 459–63. http://dx.doi.org/10.1086/704242.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Artículos de revistas sobre el tema "Paleobotany"

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros