La transición ediacárico-cámbrica: facies sedimentarias versus extinción

J. G. Gehling; D. C. García-Bellido; M. L. Droser; M. L. Tarhan; B. Runnegar

doi:10.3989/egeol.43601.554

Autores/as

J. G. Gehling Earth Sciences Section, South Australian Museum https://orcid.org/0000-0001-8459-5440
D. C. García-Bellido Earth Sciences Section, South Australian Museum https://orcid.org/0000-0003-1922-9836
M. L. Droser Department of Earth Sciences, University of California at Riverside https://orcid.org/0000-0001-7112-5669
M. L. Tarhan Department of Geology and Geophysics, Yale University https://orcid.org/0000-0002-5878-929X
B. Runnegar Department of Earth, Planetary and Space Sciences, University of California https://orcid.org/0000-0002-7412-7982

DOI:

https://doi.org/10.3989/egeol.43601.554

Palabras clave:

Control de facies, Cordillera de Flinders, Ediacárico, Australia

Resumen

Un estudio reciente de la Cuarcita de Rawnsley, en el Ediacárico terminal Ediacaran de la Cordillera de Flinders, Australia meridional, demuestra cómo algunos taxones clave de la biota de Ediacara están restringidos a ciertas facies sedimentarias y determinados niveles estratigráficos. La Cuarcita de Rawnsleycomprende tres miembros separados por discotinuidades: (i) el Miembro basal de la Arenisca de Chace es somera y azoica, aunque destacan las superficies con texturas orgánicas; (ii) el Miemrbo de la Arenisca de Ediacara rellena un Sistema de incisiones submarinas que recortan el miembro inferior de Chace y la Arenisca parálica de Bonney, infrayacente a la Cuarcita de Rawnsley; y (iii) el Miembro de la Arenisca de Ediacara es asimismo recortada de forma erosiva por el Miembro de la Arenisca de Nilpena, menos fosilífera.

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Citas

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