Early Cambrian archaeocyathan limestone blocks in low-grade meta-conglomerate from El Jagüelito Formation (Sierra Grande, Río Negro, Argentina)
Massive grey limestone blocks containing a fairly diverse but poorly preserved archaeocyath fauna were recovered from a meta-conglomerate bed in the El Jagüelito Formation (Sierra Grande area, Eastern North Patagonian Massif, Río Negro, Argentina). This is the first documented reference of the prese...
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Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)
2011
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ftdoajarticles:oai:doaj.org/article:aeb3498385034334a06a17a6c7a09cba 2023-11-12T04:06:19+01:00 Early Cambrian archaeocyathan limestone blocks in low-grade meta-conglomerate from El Jagüelito Formation (Sierra Grande, Río Negro, Argentina) P.D. GONZÁLEZ M.F. TORTELLO S.E. DAMBORENEA 2011-07-01T00:00:00Z https://doaj.org/article/aeb3498385034334a06a17a6c7a09cba EN eng Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) https://revistes.ub.edu/index.php/GEOACTA/article/view/2089 https://doaj.org/toc/1696-5728 1696-5728 https://doaj.org/article/aeb3498385034334a06a17a6c7a09cba Geologica Acta, Vol 9, Iss 2 (2011) Archaeocyatha Early Cambrian El Jagüelito Formation Low-grade metamorphism North Patagonian Massif Argentina Science Q Geology QE1-996.5 article 2011 ftdoajarticles 2023-10-22T00:36:06Z Massive grey limestone blocks containing a fairly diverse but poorly preserved archaeocyath fauna were recovered from a meta-conglomerate bed in the El Jagüelito Formation (Sierra Grande area, Eastern North Patagonian Massif, Río Negro, Argentina). This is the first documented reference of the presence of archaeocyaths in continental Argentina. Seven different taxa were identified, preliminary described and figured. Recrystallization of the skeletons due to regional low-grade metamorphism and deformation of the unit does not allow observation of key detailed features and prevents identification to genera and species. Nevertheless, the specimens studied show general affinities with archaeocyathan assemblages from the Australia-Antarctica palaeobiogeographic province and indicate a middle Early Cambrian (Atdabanian-Botomian) maximum age for the deposition of the El Jagüelito Formation protoliths. The similarities between the North Patagonian Early Paleozoic El Jagüelito Formation and those rocks from Antarctica suggest a geologic and biologic common history of these regions on the same southwest margin of Gondwana during that time. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Argentina |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Archaeocyatha Early Cambrian El Jagüelito Formation Low-grade metamorphism North Patagonian Massif Argentina Science Q Geology QE1-996.5 |
spellingShingle |
Archaeocyatha Early Cambrian El Jagüelito Formation Low-grade metamorphism North Patagonian Massif Argentina Science Q Geology QE1-996.5 P.D. GONZÁLEZ M.F. TORTELLO S.E. DAMBORENEA Early Cambrian archaeocyathan limestone blocks in low-grade meta-conglomerate from El Jagüelito Formation (Sierra Grande, Río Negro, Argentina) |
topic_facet |
Archaeocyatha Early Cambrian El Jagüelito Formation Low-grade metamorphism North Patagonian Massif Argentina Science Q Geology QE1-996.5 |
description |
Massive grey limestone blocks containing a fairly diverse but poorly preserved archaeocyath fauna were recovered from a meta-conglomerate bed in the El Jagüelito Formation (Sierra Grande area, Eastern North Patagonian Massif, Río Negro, Argentina). This is the first documented reference of the presence of archaeocyaths in continental Argentina. Seven different taxa were identified, preliminary described and figured. Recrystallization of the skeletons due to regional low-grade metamorphism and deformation of the unit does not allow observation of key detailed features and prevents identification to genera and species. Nevertheless, the specimens studied show general affinities with archaeocyathan assemblages from the Australia-Antarctica palaeobiogeographic province and indicate a middle Early Cambrian (Atdabanian-Botomian) maximum age for the deposition of the El Jagüelito Formation protoliths. The similarities between the North Patagonian Early Paleozoic El Jagüelito Formation and those rocks from Antarctica suggest a geologic and biologic common history of these regions on the same southwest margin of Gondwana during that time. |
format |
Article in Journal/Newspaper |
author |
P.D. GONZÁLEZ M.F. TORTELLO S.E. DAMBORENEA |
author_facet |
P.D. GONZÁLEZ M.F. TORTELLO S.E. DAMBORENEA |
author_sort |
P.D. GONZÁLEZ |
title |
Early Cambrian archaeocyathan limestone blocks in low-grade meta-conglomerate from El Jagüelito Formation (Sierra Grande, Río Negro, Argentina) |
title_short |
Early Cambrian archaeocyathan limestone blocks in low-grade meta-conglomerate from El Jagüelito Formation (Sierra Grande, Río Negro, Argentina) |
title_full |
Early Cambrian archaeocyathan limestone blocks in low-grade meta-conglomerate from El Jagüelito Formation (Sierra Grande, Río Negro, Argentina) |
title_fullStr |
Early Cambrian archaeocyathan limestone blocks in low-grade meta-conglomerate from El Jagüelito Formation (Sierra Grande, Río Negro, Argentina) |
title_full_unstemmed |
Early Cambrian archaeocyathan limestone blocks in low-grade meta-conglomerate from El Jagüelito Formation (Sierra Grande, Río Negro, Argentina) |
title_sort |
early cambrian archaeocyathan limestone blocks in low-grade meta-conglomerate from el jagüelito formation (sierra grande, río negro, argentina) |
publisher |
Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) |
publishDate |
2011 |
url |
https://doaj.org/article/aeb3498385034334a06a17a6c7a09cba |
geographic |
Argentina |
geographic_facet |
Argentina |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Geologica Acta, Vol 9, Iss 2 (2011) |
op_relation |
https://revistes.ub.edu/index.php/GEOACTA/article/view/2089 https://doaj.org/toc/1696-5728 1696-5728 https://doaj.org/article/aeb3498385034334a06a17a6c7a09cba |
_version_ |
1782327413655470080 |