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Journal articles on the topic 'Paleontology Proterozoic'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 January 2023

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

Jaziri, Adam Yassin, Benjamin Charnay, Franck Selsis, Jérémy Leconte, and Franck Lefèvre. "Dynamics of the Great Oxidation Event from a 3D photochemical–climate model." Climate of the Past 18, no. 10 (October 25, 2022): 2421–47. http://dx.doi.org/10.5194/cp-18-2421-2022.

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Abstract. From the Archean toward the Proterozoic, the Earth's atmosphere underwent a major shift from anoxic to oxic conditions at around 2.4 to 2.1 Ga known as the Great Oxidation Event (GOE). This rapid transition may be related to an atmospheric instability caused by the formation of the ozone layer. Previous works were all based on 1D photochemical models. Here, we revisit the GOE with a 3D photochemical–climate model to investigate the possible impact of the atmospheric circulation and the coupling between the climate and the dynamics of the oxidation. We show that the diurnal, seasonal

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12

García, Marcelo, Germán Aguilar, María Pía Rodríguez, and James Metcalf. "(U-Th)/He ages of Proterozoic-Paleozoic basement rocks from northern Chile (18-19° S) and implications on the Neogene uplift history of the Western Cordillera." Andean Geology 49, no. 3 (September 30, 2022): 313. http://dx.doi.org/10.5027/andgeov49n3-3402.

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In the Western Cordillera of northern Chile, the Proterozoic-Paleozoic Belén Metamorphic Complex is covered by late Oligocene-early Miocene (25-18 Ma) rocks, and both units are involved in west-vergent contractional deformation, which results in exhumation. A Miocene age (18 to 6 Ma) for deformation has been previously constrained by stratigraphy and cross-cutting relationships. To understand the youngest exhumation event and reverse faulting, we obtained 21 (U-Th)/He ages from two samples of the metamorphic rocks and the associate inverse thermal modeling. Five zircon (U-Th)/He ages from one

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13

Repetski, J. E., M. E. Taylor, D. S. Collins, A. R. Palmer, G. D. Wood, and R. C. Tobin. "Integrating paleontology, geothermometry, and sedimentology in determining the history of the Reelfoot Basin, southern midcontinent, U.S.A." Paleontological Society Special Publications 6 (1992): 243. http://dx.doi.org/10.1017/s2475262200008030.

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The northeast-trending Reelfoot basin, extending from northeast Arkansas and westernmost Tennessee into southeastern Missouri, southernmost Illinois, and westernmost Kentucky, is geologically, and socioeconomically, significant because it is co-extensive with the New Madrid Seismic Zone, one of the most seismically active areas of the central and eastern United States. The basin has been periodically active from its inception as a rift basin in the Proterozoic to the present and has accumulated up to at least 5,000 m of sediment, including up to at least 1 km of Cretaceous and Tertiary sedimen

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14

Baldermann, Andre, Oliver Wasser, Elshan Abdullayev, Stefano Bernasconi, Stefan Löhr, Klaus Wemmer, Werner E. Piller, Maxim Rudmin, and Sylvain Richoz. "Palaeo-environmental evolution of Central Asia during the Cenozoic: new insights from the continental sedimentary archive of the Valley of Lakes (Mongolia)." Climate of the Past 17, no. 5 (September 29, 2021): 1955–72. http://dx.doi.org/10.5194/cp-17-1955-2021.

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Abstract. The Valley of Lakes basin (Mongolia) contains a unique continental sedimentary archive, suitable for constraining the influence of tectonics and climate change on the aridification of Central Asia in the Cenozoic. We identify the sedimentary provenance, the (post)depositional environment and the palaeo-climate based on sedimentological, petrographical, mineralogical, and (isotope) geochemical signatures recorded in authigenic and detrital silicates as well as soil carbonates in a sedimentary succession spanning from ∼34 to 21 Ma. The depositional setting was characterized by an ephem

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15

Culver, Stephen J., John E. Repetski, John Pojeta, and David Hunt. "Early and Middle(?) Cambrian metazoan and protistan fossils from West Africa." Journal of Paleontology 70, no. 1 (January 1996): 1–6. http://dx.doi.org/10.1017/s0022336000023052.

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Supposed Upper Proterozoic strata in the southwest Taoudeni Basin, Guinea and Senegal, and from the Mauritanide fold belt, Mauritania, have yielded mostly poorly preserved small skeletal fossils of metazoan and protistan origin. Problematic, but possible echinoderm material and spicules of the heteractinid sponge Eiffelia dominate the Taoudeni Basin assemblage. The age of the material is not certain but the paleontologic data suggest an Early Cambrian age for the stratigraphically lowest faunas, and a Middle Cambrian age is possible for the stratigraphically highest collections.

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16

Botor, Dariusz, Stanisław Mazur, Aneta A. Anczkiewicz, István Dunkl, and Jan Golonka. "Thermal history of the East European Platform margin in Poland based on apatite and zircon low-temperature thermochronology." Solid Earth 12, no. 8 (August 20, 2021): 1899–930. http://dx.doi.org/10.5194/se-12-1899-2021.

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Abstract. The Phanerozoic tectonothermal evolution of the SW slope of the East European Platform (EEP) in Poland is reconstructed by means of thermal maturity, low-temperature thermochronometry, and thermal modelling. We provide a set of new thermochronometric data and integrate stratigraphic and thermal maturity information to constrain the burial and thermal history of sediments. Apatite fission track (AFT) analysis and zircon (U-Th)/He (ZHe) thermochronology have been carried out on samples of sandstones, bentonites, diabase, and crystalline basement rocks collected from 17 boreholes locate

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17

Palacios, Teodoro. "Gonzalo Vidal (1943-1997): una vida dedicada a la investigación en micropaleontología del Precámbrico." Spanish Journal of Palaeontology 13, no. 3 (February 27, 2022): 5. http://dx.doi.org/10.7203/sjp.23972.

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El comienzo del año 1997 nos trajo una triste noticia, el profesor Gonzalo Vidal había fallecido el 10 de enero en Uppsala (Suecia) a causa de un infarto. Para los que le conocíamos y habíamos tenido el honor de compartir su trabajo, suponía una ausencia irreparable tanto en el sentido personal como en el científico; para la comunidad científica, la perdida de uno de los mejores investigadores que ha dado la ciencia española en el campo de la Paleontología. Sus investigaciones estaban centradas en el estudio de microbiotas de edad Proterozoico-Cámbrico (1.700- 500 Ma.) y su área de investigaci

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18

Schopf, J. William. "Precambrian Prokaryotes and Stromatolites." Notes for a Short Course: Studies in Geology 18 (1987): 20–33. http://dx.doi.org/10.1017/s0271164800001482.

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In terms of biochemical and intracellular organization, living systems can be divided into two major “Superkingdoms,” eukaryotes and prokaryotes.Eukaryotes, comprising the more advanced and later evolving Superkingdom, include unicellular or multicellular organisms (viz., members of the Kingdoms Protista, Fungi, Plantae and Animalia) characterized by nucleus-, mitochondrion-, and (in plants and some protists) chloroplast-containing cells that are capable typically of mitotic cell division. Paleontologic evidence indicates that the eukaryotic cell originated during the Middle Proterozoic, proba

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19

Zabini, Carolina, and Maria Antônia Michels Souza. "Três conceitos biológicos/paleontológicos que seguem as diretrizes dos PCN do ensino médio para aplicação em aulas de Biologia." Terrae Didatica 12, no. 2 (August 2, 2016): 104. http://dx.doi.org/10.20396/td.v12i2.8646319.

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Este artigo visa apresentar três exemplos de aplicação de temas paleobiológicos aplicáveis a salas de aulas do Ensino Médio (EM), conforme as sugestões de interdisciplinaridade de conteúdo em Biologia encontradas nos parâmetros curriculares nacionais (PCNEM). O principal objetivo é fornecer, a professores do EM, exemplos de conceitos que não estão facilmente acessíveis a eles na bibliografia destes anos iniciais. O uso destes conceitos em aula visa não somente formar alunos com conhecimentos práticos e contextualizados (para a vida profissional), mas também conhecimentos mais amplos e abstrato

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20

Sawin, Robert S., Evan K. Franseen, Greg A. Ludvigson, W. Lynn Watney, and Ronald R. West. "Precambrian Nomenclature in Kansas." Current Research in Earth Sciences, April 11, 2013, 1–5. http://dx.doi.org/10.17161/cres.v0i259.11840.

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The informal stratigraphic term "Precambrian" is replaced by formal nomenclature--Proterozoic and Archean Eonothems/Eons--and the informal term Hadean. The Phanerozoic Eonothem/Eon, representing all rocks younger than the Proterozoic, is added. The Proterozoic is further divided into Paleoproterozoic, Mesoproterozoic, and Neoproterozoic Erathems/Eras. The name Rice Formation (Scott, 1966) is abandoned, and the use of the informal term "Rice unit" is recommended. The proposed name Rice Series (Berendsen, 1994) is not accepted. These changes are adopted by the Kansas Geological Survey (KGS) and

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21

Sawin, Robert S., Evan K. Franseen, Greg A. Ludvigson, W. Lynn Watney, and Ronald R. West. "Precambrian Nomenclature in Kansas." Current Research in Earth Sciences, April 11, 2013, 1–5. http://dx.doi.org/10.17161/cres.v0i259.11840.

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The informal stratigraphic term "Precambrian" is replaced by formal nomenclature--Proterozoic and Archean Eonothems/Eons--and the informal term Hadean. The Phanerozoic Eonothem/Eon, representing all rocks younger than the Proterozoic, is added. The Proterozoic is further divided into Paleoproterozoic, Mesoproterozoic, and Neoproterozoic Erathems/Eras. The name Rice Formation (Scott, 1966) is abandoned, and the use of the informal term "Rice unit" is recommended. The proposed name Rice Series (Berendsen, 1994) is not accepted. These changes are adopted by the Kansas Geological Survey (KGS) and

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22

Bittencourt, Jonathas S., Matheus Kuchenbecker, André Gomide Vasconcelos, and Karin E. B. Meyer. "O REGISTRO FÓSSIL DAS COBERTURAS SEDIMENTARES DO CRÁTON DO SÃO FRANCISCO EM MINAS GERAIS." Geonomos, December 31, 2015. http://dx.doi.org/10.18285/geonomos.v23i2.710.

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O registro fóssil dos depósitos sedimentares proterozoicos, paleozoicos e mesozoicos do Cráton do São Francisco inclui estruturas de origem microbiana (microbialitos, oncólitos), palinomorfos terrestres e marinhos, microfósseis silicosos e carbonáticos de origem marinha, metazoários neoproterozoicos, artrópodes, uma variedade de bioturbações, vertebrados actinopterígios, sarcopterígios e dinossauros. Com exceção dos microbialitos, que são amplamente distribuídos, os fósseis são relativamente escassos se comparados com a extensão geográfica dos depósitos e concentrados em alguns horizontes estr

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23

García, Marcelo, Germán Aguilar, María Pía Rodríguez, and James Metcalf. "(U-Th)/He ages of Proterozoic-Paleozoic basement rocks from northern Chile (18-19°S) and implications on the Neogene uplift history of the Western Cordillera." Andean Geology 49, no. 3 (June 7, 2022). http://dx.doi.org/10.5027/andgeov49n3-3477.

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In the Western Cordillera of northern Chile, the Proterozoic-Paleozoic Belén Metamorphic Complex is covered by late Oligocene-early Miocene (25-18 Ma) rocks, and both units are involved in west-vergent contractional deformation, which results in exhumation. A Miocene age (18 to 6 Ma) for deformation has been previously constrained by stratigraphy and cross-cutting relationships. To understand the youngest exhumation event and reverse faulting, we obtained 21 (U-Th)/He ages from two samples of the metamorphic rocks and the associate inverse thermal modeling. Five zircon (U-Th)/He ages from one

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24

Fraga, Lucio Mauro Soares, Soraya de Carvalho Neves, Gabriela Luiza Pereira Pires, Adriano Luiz Tibães, and Alexandre Uhlein. "ESTROMATÓLITOS COLUNARES NA BASE DO GRUPO MACAÚBAS, NORDESTE DA SERRA DO ESPINHAÇO (MG): PALEONTOLOGIA E AMBIENTE DE SEDIMENTAÇÃO." Geonomos, July 31, 2013. http://dx.doi.org/10.18285/geonomos.v21i1.254.

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Na região nordeste da Serra do Espinhaço Meridional são encontrados metassedimentos da base do Grupo Macaúbas,constituídos por quartzitos, camadas de metapelitos e rochas metacarbonáticas, depositadas em diferentes ambientes de sedimentação:continental, transicional e marinho. Na Formação Domingas ocorrem camadas de metapelitos contendo lentes isoladas de dolomitos comum rico conteúdo paleontológico formado por estruturas estromatolíticas colunares. Em trabalhos de campo recentes foram encontradas edescritas duas lentes de dolomitos na região de Inhaí (região da Fazenda Boqueirão) e uma lente

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