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The 2.1 Ga old Francevillian biota: biogenicity, taphonomy and biodiversity

El Albani, Abderrazak ; Bengtson, Stefan ; Canfield, Donald E ; Riboulleau, Armelle ; Rollion Bard, Claire ; Macchiarelli, Roberto ; Ngombi Pemba, Lauriss ; Hammarlund, Emma ; Meunier, Alain ; Moubiya Mouele, Idalina ; Benzerara, Karim ; Bernard, Sylvain ; Boulvais, Philippe ; Chaussidon, Marc ; Cesari, Christian ; Fontaine, Claude ; Chi-Fru, Ernest ; Garcia Ruiz, Juan Manuel ; Gauthier-Lafaye, François ; Mazurier, Arnaud ; Pierson-Wickmann, Anne Catherine ; Rouxel, Olivier ; Trentesaux, Alain ; Vecoli, Marco ; Versteegh, Gerard J M ; White, Lee ; Whitehouse, Martin ; Bekker, Andrey Rook, Lorenzo

PloS one, 2014-06, Vol.9 (6), p.e99438-e99438 [Periódico revisado por pares]

United States: Public Library of Science

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Título:
The 2.1 Ga old Francevillian biota: biogenicity, taphonomy and biodiversity
Autor: El Albani, Abderrazak ; Bengtson, Stefan ; Canfield, Donald E ; Riboulleau, Armelle ; Rollion Bard, Claire ; Macchiarelli, Roberto ; Ngombi Pemba, Lauriss ; Hammarlund, Emma ; Meunier, Alain ; Moubiya Mouele, Idalina ; Benzerara, Karim ; Bernard, Sylvain ; Boulvais, Philippe ; Chaussidon, Marc ; Cesari, Christian ; Fontaine, Claude ; Chi-Fru, Ernest ; Garcia Ruiz, Juan Manuel ; Gauthier-Lafaye, François ; Mazurier, Arnaud ; Pierson-Wickmann, Anne Catherine ; Rouxel, Olivier ; Trentesaux, Alain ; Vecoli, Marco ; Versteegh, Gerard J M ; White, Lee ; Whitehouse, Martin ; Bekker, Andrey
Rook, Lorenzo
Assuntos: Analysis ; Atmospheric oxygen ; Biodiversity ; Biological Evolution ; Biology and Life Sciences ; Biota ; colonies ; Diagenesis ; Diagenesis (Geology) ; Diversity of life ; Earth ; Earth Sciences ; Earth surface ; Earth's surface ; Elongated structure ; Evolution ; Fossils ; Francevillian ; Gabon ; Geobiology ; Geochemistry ; Geology ; Livets mångfald ; Macroevolution ; Marine ecosystems ; Metamorphic rocks ; Metamorphism ; Metamorphism (geology) ; Microtomography ; multicellularity ; Museums ; Natural history ; Origin of Life ; Other ; Oxidation ; Oxygen ; Oxygenation ; Palaeoproterozoic ; Paleontology ; Phylogeny ; Sciences of the Universe ; Sediments ; Shales ; Sulfur ; Taphonomy
É parte de: PloS one, 2014-06, Vol.9 (6), p.e99438-e99438
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Conceived and designed the experiments: AEA S. Bengtson DEC AR A. Meunier EH RM. Performed the experiments: AEA DEC S. Bengtson AR CRB LNP EH MW PB MC ACPW OR A. Mazurier IMM CC KB S. Bernard CF. Analyzed the data: AEA S. Bengtson DEC AR CRB EH RM AB KB S. Bernard FGL MV. Contributed reagents/materials/analysis tools: AEA S. Bengtson DEC AR CRB JMGR ECF LNP EH AB PB MC ACPW OR MW A. Meunier GV AT IMM ECF LW. Wrote the paper: AEA S. Bengtson DEC AR EH RM AB.
Competing Interests: The authors have declared that no competing interests exist.
Descrição: The Paleoproterozoic Era witnessed crucial steps in the evolution of Earth's surface environments following the first appreciable rise of free atmospheric oxygen concentrations ∼2.3 to 2.1 Ga ago, and concomitant shallow ocean oxygenation. While most sedimentary successions deposited during this time interval have experienced thermal overprinting from burial diagenesis and metamorphism, the ca. 2.1 Ga black shales of the Francevillian B Formation (FB2) cropping out in southeastern Gabon have not. The Francevillian Formation contains centimeter-sized structures interpreted as organized and spatially discrete populations of colonial organisms living in an oxygenated marine ecosystem. Here, new material from the FB2 black shales is presented and analyzed to further explore its biogenicity and taphonomy. Our extended record comprises variably sized, shaped, and structured pyritized macrofossils of lobate, elongated, and rod-shaped morphologies as well as abundant non-pyritized disk-shaped macrofossils and organic-walled acritarchs. Combined microtomography, geochemistry, and sedimentary analysis suggest a biota fossilized during early diagenesis. The emergence of this biota follows a rise in atmospheric oxygen, which is consistent with the idea that surface oxygenation allowed the evolution and ecological expansion of complex megascopic life.
Editor: United States: Public Library of Science
Idioma: Inglês

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The 2.1 Ga old Francevillian biota: biogenicity, taphonomy and biodiversity

United States: Public Library of Science

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