Paléoécologie de certains stromatolites en récifs des formations du Précambrien supérieur du groupe d'atar (mauritanie, sahara occidental): Création d'espèces nouvelles

Bertrand-Sarfati, Janine

doi:10.1016/0031-0182(72)90036-3

Cited by 21 publications

(10 citation statements)

References 13 publications

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“…The stromatolitic flora is similar to that of the cratonic Atar Group in the western Taoudéni Basin (Bertrand-Sarfati, 1972;Moussine-Pouchkine et al, 1988). The Stromatolite Series is interpreted as deposited in cratonic platform areas or in a subsiding passive margin of the Transaharan Ocean.…”

Section: The High Grade Metamorphic Mega-unitmentioning

confidence: 96%

Pan-African tectonic evolution and glacial events registered in Neoproterozoic to Cambrian cratonic and foreland basins of West Africa

Deynoux

Affaton

Trompette³

et al. 2006

Journal of African Earth Sciences

144

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Section: The High Grade Metamorphic Mega-unitmentioning

confidence: 96%

Pan-African tectonic evolution and glacial events registered in Neoproterozoic to Cambrian cratonic and foreland basins of West Africa

Deynoux

Affaton

Trompette³

et al. 2006

Journal of African Earth Sciences

144

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“…However, the studied Miocene columns show other aspects that differ from many Proterozoic examples (Fig. 16) and that are not likely to be microbial accretionary features: (i) the highly irregular boundaries between columns and intercolumn space (Figs 7H, 10A, 10C, 11, 12 and 13); (ii) the fact that this boundary commonly seems to cut the internal structures of the columns (Figs 11 to 13); (iii) the sporadic Walter (1972), Bertrand-Sarfati (1972 and Grey & Awramik (2020). (B) New morphogenetic model presented here for microbialites (mainly Phanerozoic, but probably also Upper Proterozoic) whose columnar morphology is influenced by bioturbation during or very soon after microbial accretion, as well as grainy sedimentation between the columns.…”

Section: Morphogenesis Of Columnar Microbialites: Constructive Destructive or Both?mentioning

confidence: 84%

Columnar microbialites of the upper Miocene of Mallorca (Spain): A new morphogenetic model based on concurrent accretion and bioturbation – uncommon or overlooked?

et al. 2021

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Bioturbation has long been considered an antagonist of microbialite development and preservation, because metazoan grazing and burrowing destroy benthic microbial communities. However, metazoan bioturbation, in conjunction with microbial accretion, may have had a significant role in the morphogenesis of some columnar microbialites, as suggested by the case study presented and by some Phanerozoic and Upper Proterozoic analogues discussed here. Late Miocene in age, the studied microbial biostrome developed in a western Mediterranean restricted shallow‐water platform dominated by grainy sediments and with a notable influence of bioturbation. This study is focused on the complex accretionary history of the columnar microbialite biostrome and on its striking dark grey colour, which is attributed to Mn‐oxyhydroxides precipitated during meteoric diagenesis linked to subaerial exposure. The characteristic columnar structure of the microbialite biostrome has features consistent with an accretionary origin of the columns, but also has features suggesting metazoan disruption. Therefore, a new morphogenetic model for columnar microbialites is presented, highlighting the concomitant roles of microbial accretion, bioturbation and grainy sediment infill of the intercolumn space. Whether this model is an exception or a rule, should be tested on other examples of Phanerozoic and Upper Proterozoic columnar microbialites. Nevertheless, this model is a step forward in understanding the complex microbe–metazoan interactions as constructive coexistence rather than just as destructive competition.

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“…30-40; seed, closely associated with the stem Buteoxylon gordonianum but its relationship has not been es-30 INDEX OF GENERIC NAMES OF FOSSIL PLANTS, 1966 tablished; Upper Carboniferous; Oxroad Bay, East Lothian, Scotland. TARIOUFETIA Bertrand-Sarfati, 1972. Tarioufetia hemispherica Bertrand-Sarfati, 1972 stromatolite; upper Precambrian; Mauritania, Sahara Occidental.…”

Section: Selesjcutismentioning

confidence: 99%

Index of generic names of fossil plants, 1966-1973

Andrews¹

1975

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I have received help of many kinds during the preparation of the supplement, all of which is sincerely appreciated. Sergius H. Mamay generally supervised this work; he and Francis M. Hueber of the Smithsonian Institution assisted me with problems of fossil identification and other technicalities. For assistance in library research I thank Marjorie Arnold and Arthur D. Watt. Birute Saldukas gave valuable help in linguistic problems. The librarians of the U.S. Geological Survey and the Smithsonian Institution gave generously of their time in locating publications. I owe special thanks to Marcia Lakeman of the Geological Society of America for her advice and help in cataloguing.

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Paléoécologie de certains stromatolites en récifs des formations du Précambrien supérieur du groupe d'atar (mauritanie, sahara occidental): Création d'espèces nouvelles

Cited by 21 publications

References 13 publications

Pan-African tectonic evolution and glacial events registered in Neoproterozoic to Cambrian cratonic and foreland basins of West Africa

Pan-African tectonic evolution and glacial events registered in Neoproterozoic to Cambrian cratonic and foreland basins of West Africa

Columnar microbialites of the upper Miocene of Mallorca (Spain): A new morphogenetic model based on concurrent accretion and bioturbation – uncommon or overlooked?

Index of generic names of fossil plants, 1966-1973

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