Academic literature on the topic 'Paleontology Proterozoic'

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Journal articles on the topic "Paleontology Proterozoic"

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Vidal, Gonzalo. "Proterozoic and Cambrian bioevents." Spanish Journal of Palaeontology 13, no. 3 (February 27, 2022): 11. http://dx.doi.org/10.7203/sjp.23973.

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Astafieva, M. M., S. B. Felitsyn, and N. A. Alfimova. "Bacterial Remains in the Lower Proterozoic Red-Colored Quartzites." Paleontological Journal 55, no. 4 (July 2021): 447–54. http://dx.doi.org/10.1134/s003103012104002x.

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MOORE, KELSEY R., THEODORE M. PRESENT, FRANK PAVIA, JOHN P. GROTZINGER, JOSEPH RAZZELL HOLLIS, SUNANDA SHARMA, DAVID FLANNERY, et al. "BIOSIGNATURE PRESERVATION AIDED BY ORGANIC-CATION INTERACTIONS IN PROTEROZOIC TIDAL ENVIRONMENTS." PALAIOS 37, no. 9 (September 15, 2022): 486–98. http://dx.doi.org/10.2110/palo.2022.017.

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Abstract The preservation of organic biosignatures during the Proterozoic Eon required specific taphonomic windows that could entomb organic matter to preserve amorphous kerogen and even microbial body fossils before they could be extensively degraded. Some of the best examples of such preservation are found in early diagenetic chert that formed in peritidal environments. This chert contains discrete domains of amorphous kerogen and sometimes kerogenous microbial mat structures and microbial body fossils. Our understanding of how these exquisite microfossils were preserved and the balance betw
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Gaucher, Claudio, Peter Sprechman, and Alejandro Schipilov. "Upper and Middle Proterozoic fossiliferous sedimentary sequences of the Nico Pérez Terrane of Uruguay: Lithostratigraphic units, paleontology, depositional environments and correlations." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 199, no. 3 (April 24, 1996): 339–67. http://dx.doi.org/10.1127/njgpa/199/1996/339.

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Holm-Denoma, Christopher S., William A. Matthews, Linda K. Soar, Mark W. Longman, and James W. Hagadorn. "Provenance of Devonian–Carboniferous strata of Colorado: The influence of the Cambrian and the Proterozoic." Rocky Mountain Geology 57, no. 1 (June 1, 2022): 1–21. http://dx.doi.org/10.24872/rmgjournal.57.1.1.

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ABSTRACT We report new LA-ICP-MS U–Pb detrital zircon ages and sedimentary petrology of silty to sandy limestones and dolostones, as well as calcareous to dolomitic sandstones of the Devonian–Carboniferous (Mississippian) Chaffee Group. We also report new detrital zircon ages from the late Cambrian Sawatch Quartzite, and a U–Pb zircon crystallization age on a late Mesoproterozoic (1087.9 ± 13.5 Ma) granitoid of underlying basement from the Eagle Basin of northwest Colorado. Grain populations in the Chaffee Group are mostly bimodal. More than 84% of zircons centered around a Paleoproterozoic (c
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Xiao, Shuhai, and Qing Tang. "After the boring billion and before the freezing millions: evolutionary patterns and innovations in the Tonian Period." Emerging Topics in Life Sciences 2, no. 2 (June 29, 2018): 161–71. http://dx.doi.org/10.1042/etls20170165.

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The Tonian Period (ca. 1000–720 Ma) follows the ‘boring billion' in the Mesoproterozoic Era and precedes ‘snowball Earth' glaciations in the Cryogenian Period. It represents a critical transition in Earth history. Geochemical data indicate that the Tonian Period may have witnessed a significant increase in atmospheric pO2 levels and a major transition from predominantly sulfidic to ferruginous mid-depth seawaters. Molecular clock estimates suggest that early animals may have diverged in the Tonian Period, raising the intriguing possibility of coupled environmental changes and evolutionary inno
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Duda, Jan-Peter, Hannah König, Manuel Reinhardt, Julia Shuvalova, and Pavel Parkhaev. "Molecular fossils within bitumens and kerogens from the ~ 1 Ga Lakhanda Lagerstätte (Siberia, Russia) and their significance for understanding early eukaryote evolution." PalZ 95, no. 4 (December 2021): 577–92. http://dx.doi.org/10.1007/s12542-021-00593-4.

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AbstractThe emergence and diversification of eukaryotes during the Proterozoic is one of the most fundamental evolutionary developments in Earth’s history. The ca. 1-billion-year-old Lakhanda Lagerstätte (Siberia, Russia) contains a wealth of eukaryotic body fossils and offers an important glimpse into their ecosystem. Seeking to complement the paleontological record of this remarkable lagerstätte, we here explored information encoded within sedimentary organic matter (total organic carbon = 0.01–1.27 wt.%). Major emphasis was placed on sedimentary hydrocarbons preserved within bitumens and ke
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Horodyski, Robert J. "Paleontology of proterozoic shales and mudstones: examples from the Belt supergroup, Chuar group and Pahrump group, western USA." Precambrian Research 61, no. 3-4 (March 1993): 241–78. http://dx.doi.org/10.1016/0301-9268(93)90116-j.

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PRATT, BRIAN R. "KINNEYIA-TYPE WRINKLE STRUCTURES ON SANDSTONE BEDS: NOT MICROBIALLY INDUCED BUT DEFORMATION FEATURES CAUSED BY SYNSEDIMENTARY EARTHQUAKES." PALAIOS 36, no. 10 (October 27, 2021): 313–25. http://dx.doi.org/10.2110/palo.2021.015.

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ABSTRACT A category of wrinkle structures, often termed Kinneyia structure or Runzel marks, comprises bedding plane features consisting typically of anastomosing, low-relief, flat-topped ridges with intervening depressions. Topographic relief is usually less than a millimeter. They are locally common on the upper surfaces of fine- to medium-grained sandstone beds interbedded with mudstone deposited in offshore settings, especially in Precambrian and lower Paleozoic strata but as young as Cretaceous. For more than the last two decades these wrinkle structures have been widely regarded as due to
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Tang, Qing, Ke Pang, Guangjin Li, Lei Chen, Xunlai Yuan, Mukund Sharma, and Shuhai Xiao. "The Proterozoic macrofossil Tawuia as a coenocytic eukaryote and a possible macroalga." Palaeogeography, Palaeoclimatology, Palaeoecology 576 (August 2021): 110485. http://dx.doi.org/10.1016/j.palaeo.2021.110485.

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Dissertations / Theses on the topic "Paleontology Proterozoic"

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Filho, William Sallun. "Análise dos Estromatólitos do Grupo Itaiacoca (Proterozóico), ao Sul de Itapeva, SP." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/44/44136/tde-10052010-165919/.

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Estromatólitos foram estudados em nove localidades ao sul de Itapeva (SP), principalmente em metacalcários dolomíticos cinza-claro e, secundariamente, em metacalcários calcíticos cinza-escuro, do Grupo Itaiacoca, uma unidade vulcanossedimentar mesoproterozóica da Faixa Ribeira. Foram diferenciados em cinco formas colunares, a mais comum consistindo de colunas coniformes, não ramificadas, de diâmetros e alturas centimétricas a decimétricas, atribuídas a Conophyton. As outras quatro formas, com laminação convexa mas não coniforme, diferem em tamanho, silhueta e estilo/freqüência de ramificação.
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Baghiyan-Yazd, Mohammad Hassan. "Palaeoichnology of the terminal Proterozoic-Early Cambrian transition in central Australia : interregional correlation and palaeoecology." Title page, table of contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phb1445.pdf.

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Schiffbauer, James Daniel. "Contributions and New Methods in Paleontology: Geochemical, Ultrastructural, and Microstructural Characterization of Archean, Proterozoic, and Phanerozoic Fossils." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/27519.

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Over the past decade, the study of organismal or systematic paleobiology has been progressing into a new age of digital paleobiology, in which advanced instrumentation is utilized for primary data collection and analyses. Having been progressing throughout this field of study, advanced instruments–commonly electron- and ion- microbeam equipment–have been employed for numerous fossils over the entire range of geologic time, from microfossils to macrofossils and from the Archean (beginning at 3800 Ma) to the Cenozoic (ending at the recent). These techniques, predominantly used for geochemical, m
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Subacius, Sandra Maria Rodrigues. "Estudo biogeoquímico e micropaleontológico do silex negro da FM. Sete Lagoas, GR. Bambui (Proterozóico Superior) São Gabriel (GO), Brasil." Universidade de São Paulo, 1986. http://www.teses.usp.br/teses/disponiveis/44/44132/tde-15092015-144321/.

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O estudo biogeoquímico da matéria orgânica (MO) amorfa e estruturada (microfósseis) associada a duas amostras de sílex negro (SG-1 e SG-2), finamente laminados, da Formação Sete Lagoas, Grupo Bambuí (Proterozóico Superior), da localidade de São Gabriel, Estado de Goiás (Brasil), revelou que: 1. A MO amorfa, que perfaz cerca de 0,12% do conteúdo total de carbono orgânico, é constituída por duas frações, solúvel e insolúvel, sendo que apenas o querogênio é singenético. 2. A fração solúvel (FS) alóctona provém de várias fontes, predominando a MO móvel migrada de sedimentos do Fanerozóico e de con
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Delpomdor, Franck. "Sedimentology, geochemistry and depositional environments of the 1175-570 Ma carbonate series, Sankuru-Mbuji-Mayi-Lomami-Lovoy and Bas-Congo basins, Democratic Republic of Congo: new insights into late Mesoproterozoic and Neoproterozoic glacially- and/or tectonically-influenced sedimentary systems in equatorial Africa." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209486.

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The one of the most important Eras of the Earth history, i.e. Neoproterozoic (1000-542 Ma),<p>was an enigmatic period characterized by the development of the first stable long-lived ~1.1-<p>0.9 Ga Rodinia and 550-500 Ma Gondwana supercontinents, global-scale orogenic belts,<p>extreme climatic changes (cf. Snowball Earth Hypothesis), the development of microbial<p>organisms facilitating the oxidizing atmosphere and explosion of eukaryotic forms toward the<p>first animals in the terminal Proterozoic. This thesis presents a multidisciplinary study of two<p>Neoproterozoic basins, i.e. Bas-Congo an
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Lisboa, Vinícius Anselmo Carvalho. "Petrologia e geocronologia do Maciço Glória Norte, faixa de dobramentos sergipana, NE do Brasil." Pós-Graduação em Geociências e Análise de Bacias, 2014. https://ri.ufs.br/handle/riufs/5387.

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O Domínio Macururé, localizado na porção norte da Faixa de Dobramentos Sergipana, é caracterizado por apresentar um grande volume de granitos (s.l.) de idade Neoproterozóica. O Maciço Glória Norte (MGN), que ocorre na porção centronorte do Domínio Macururé, representa uma das mais importantes intrusões que se colocaram após o pico de deformação e metamorfismo no orógeno (630 Ma). Nesse estudo identificou-se a presença de duas fácies petrográficas nesse maciço: quartzomonzonítica porfirítica, quartzo-monzonítica, além de diques leucocráticos. Os enclaves de diversos tipos, são uma feição reco
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Zang, Wenlong. "An analysis of late Proterozoic - early Cambrian microfossils and biostratigraphy in China and Australia." Phd thesis, 1988. http://hdl.handle.net/1885/140928.

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Baghiyan-Yazd, Mohammad Hassan. "Palaeoichnology of the terminal Proterozoic-Early Cambrian transition in central Australia : interregional correlation and palaeoecology / Mohammad Hassan Baghiyan-Yazd." Thesis, 1998. http://hdl.handle.net/2440/21668.

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Henderson, Miles Anthony. "A Morphological and Geochemical Investigation of Grypania spiralis: Implications for Early Earth Evolution." 2010. http://trace.tennessee.edu/utk_gradthes/715.

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Macroscopic “carbonaceous” fossils such as Grypania, Katnia, Chuaria, and Tawuia play a critical role in our understanding of biological evolution in the Precambrian and their environmental implications. Unfortunately, understanding of these fossils remains limited by their relative simplicity of form, mode of preservation, and broad taphonomic variability. As a result, debate continues as to even the fundamental taxonomic affinity of the organisms. Megascopic coiled forms (i.e. Grypania and Katnia), for instance, have been interpreted as trace fossils, multicellular algae, prokaryotic filamen
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Wade, Benjamin P. "Unravelling the tectonic framework of the Musgrave Province, Central Australia." 2006. http://hdl.handle.net/2440/57768.

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The importance of the Musgrave Province in continental reconstructions of Proterozoic Australia is only beginning to be appreciated. The Mesoproterozoic Musgrave Province sits in a geographically central location within Australia and is bounded by older and more isotopically evolved regions including the Gawler Craton of South Australia and Arunta Region of the Northern Territory. Understanding the crustal growth and deformation mechanisms involved in the formation of the Musgrave Province, and also the nature of the basement that separates these tectonic elements, allows for greater insight i
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Books on the topic "Paleontology Proterozoic"

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1941-, Schopf J. William, and Klein Cornelis 1937-, eds. The Proterozoic biosphere: A multidisciplinary study. Cambridge: Cambridge University Press, 1992.

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Hofmann, H. J. Shale-facies microfossils from the proterozoic Bylot supergroup, Baffin Island, Canada. [Tulsa, OK]: Paleontological Society, 1994.

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Zang, Wen Long. Late Proterozoic and Cambrian microfossils and biostratigraphy, Amadeus Basin, central Australia. Brisbane: Association of the Australasian Palaeontologists, 1992.

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Hofmann, H. J. Shale-facies microfossils from the proterozoic Bylot supergroup, Baffin Island, Canada. [Tulsa, OK]: Paleontological Society, 1994.

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Allison, Carol Wagner. Paleontology of late Proterozoic and early Cambrian rocks of east-central Alaska. Washington: U.S. G.P.O., 1988.

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Allison, Carol Wagner. Paleontology of late Proterozoic and early Cambrian rocks of east-central Alaska. Washington, DC: Dept. of the Interior, 1988.

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Fedonkin, M. A. Middle Proterozoic (1.5 Ga) Horodyskia moniliformis Yochelson and Fedonkin, the oldest known tissue-grade colonial eucaryote. Washington, D.C: Smithsonian Institution Press, 2002.

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Fedonkin, M. A. Middle Proterozoic (1.5 Ga) Horodyskia moniliformis Yochelson and Fedonkin, the oldest known tissue-grade colonial eucaryote. Washington, D.C: Smithsonian Institution Press, 2002.

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Fedonkin, M. A. Middle Proterozoic (1.5 Ga) Horodyskia moniliformis Yochelson and Fedonkin, the oldest known tissue-grade colonial eucaryote. Washington, D.C: Smithsonian Institution Press, 2002.

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Muhling, P. C. Geology of the Bangemall group: The evolution of an intracratonic Proterozoic basin. [Perth]: Dept. of Mines, Western Australia, 1985.

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Book chapters on the topic "Paleontology Proterozoic"

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Horodyski, Robert J. "Paleontology of the Middle Proterozoic Belt Supergroup." In Middle Proterozoic Belt Supergroup, Western Montana: Great Falls, Montana to Spokane, Washington, July 20–28, 1989, 7–26. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft334p0007.

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Signor, Philip W., and Jeffrey F. Mount. "Paleontology of the Lower Cambrian Waucoban Series in eastern California and western Nevada." In Late Proterozoic and Cambrian Tectonics, Sedimentation, and Record of Metazoan Radiation in the Western United States: Pocatello, Idaho, to Reno, Nevada 20–29 July, 1989, 47–53. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft331p0047.

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Runnegar, Bruce N., David J. Chapman, and Walter M. Fitch. "Molecular Phylogenetics, Molecular Paleontology, and the Proterozoic Fossil Record." In The Proterozoic Biosphere, 463–86. Cambridge University Press, 1992. http://dx.doi.org/10.1017/cbo9780511601064.011.

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Rowland, Stephen M. "Geology of Frenchman Mountain and Rainbow Gardens, southern Nevada, USA." In Field Excursions from Las Vegas, Nevada: Guides to the 2022 GSA Cordilleran and Rocky Mountain Joint Section Meeting, 23–43. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.0063(02).

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ABSTRACT This field guide synthesizes more than a half century of research by many geologists and paleontologists on Frenchman Mountain and Rainbow Gardens, southern Nevada, USA. The field-trip consists of seven stops to be visited in one day. The guide was written not only for field-trip participants on the occasion of the 2022 ­Cordilleran/Rocky Mountain Geological Society of America Joint Section Meeting in Las Vegas, but also with future users in mind. The Frenchman Mountain/Rainbow Gardens block of crust exposes an extraordinary sample of Earth history. The geologic features include (1) Proterozoic crystalline rocks, (2) the Great Unconformity, (2) a Paleozoic interval that is essentially a ­tilted section of the western Grand Canyon, (3) a Mesozoic interval that preserves strata that were eroded off the southern Colorado Plateau during the Miocene “Great Denudation” episode, and (4) a Cenozoic section that records a wealth of paleo­climatic, paleontological, and tectonic data. Among the many stories that are recorded in the rocks of the Frenchman Mountain/Rainbow Gardens block, I have chosen three to emphasize in this field guide: (1) the history recorded in the Proterozoic Vishnu Basement Complex and the Great Unconformity; (2) the stratigraphy, sedimentology, paleontology, and geochronology of the Cambrian Tonto Group [with a focus on (a) trilobite biostratigraphy in the Bright Angel Formation, (b) the significance of the abundance of glauconite in the Tonto Group, and (c) the Frenchman Mountain Dolostone]; and (3) the tectonic story recorded in the Thumb Member of the Horse Spring Formation. The basement rocks record events and processes associated with the assembly of supercontinents Nuna and Rodinia. The Great Unconformity records the breakup of Rodinia and the associated denudation interval that played a role in triggering the Cambrian explosion. The Tonto Group, which was recently expanded to include the Frenchman Mountain Dolostone, records the Sauk Transgression. And the Thumb Member of the Horse Spring Formation contains rock avalanche deposits that have played a key role in sorting out the tectonic history of the southern Nevada region and the translational history of the Frenchman Mountain/Rainbow Gardens block.
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