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Título: Archaeocyaths from South America: review and a new record
Autor(es): González, Pablo Diego
Tortello, Marcelo Franco
Damborenea, Susana Ester
Naipauer, Maximiliano
Sato, Ana Maria
Varela, Ricardo
Fecha de publicación: 2012
Editorial: John Wiley & Sons Ltd
Citación: Gonzalez, Pablo Diego., Tortello, Marcelo Franco., Damborenea, Susana Ester., Naipauer, Maximiliano., Sato, Ana Maria y Varela Ricardo (2012). Archaeocyaths from South America: Review and a new record. John Wiley & Sons Ltd; Geological Journal (Chichester); 48 (2-3); 114-125
Revista: Geological Journal (Chichester)
Abstract: In South America, autochthonous archaeocyathan faunas preserved in Early Cambrian limestones have not been found yet. Nevertheless, a few well-documented occurrences of these fossils in clasts contained in coarse-grained rocks of a wide age range have been discovered in recent years. Erratic limestone blocks from the Late Carboniferous-Early Permian Fitzroy Tillite Formation in the Falkland/Malvinas Islands yielded three archaeocyath taxa. Also, seven taxa were reported from archaeocyathan limestone clasts in a metaconglomerate of the Cambro-Ordovician El Jagüelito Formation in northern Patagonia. In addition, a new record from the Late Carboniferous-Early Permian Sauce Grande Formation diamictites in Sierras Australes, Buenos Aires Province, Argentina, is presented herein. Preservation of this scarce new material is poor, but at least three different taxa can be distinguished. The most likely source of all archaeocyathan limestone clasts found in southern South America is the Shackleton Limestone from the Transantarctic Mountains in East Antarctica. The new record from the Sauce Grande Formation and the inferred clast provenance reinforce the correlation between this unit, the Dwyka Tillite (South Africa) and the Fitzroy Tillite Formation (Falklands/Malvinas), suggesting a very wide distribution of these Antarctic occurrences during the Late Carboniferous-Early Permian Gondwana glaciation (Episode III). Thus, even though being allochthonous, archaeocyaths are emerging as a new key biological feature for Gondwana palaeogeographic reconstructions. © 2012 John Wiley & Sons, Ltd.
Resumen: -
URI: https://onlinelibrary.wiley.com/doi/abs/10.1002/gj.2415
http://rid.unrn.edu.ar/handle/20.500.12049/5606
Identificador DOI: https://doi.org/10.1002/gj.2415
ISSN: 0072-1050
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