A new Early Jurassic marine locality from southwestern Chubut Basin, Argentina

A shallow marine invertebrate association is reported from a new Early Jurassic locality namely La Casilda, which is situated in the southwestern region of the Chubut Basin (Patagonia, Argentina). The marine deposits of La Casilda are located in the Río Genoa valley and bear a diverse invertebrate f...

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Autores principales:	Ferrari,S. Mariel, Bessone,Santiago
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2015
Materias:	Invertebrates La Casilda Mulanguiñeu Formation Chubut Basin Argentina
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062015000300004
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spelling	oai:scielo:S0718-710620150003000042015-10-20A new Early Jurassic marine locality from southwestern Chubut Basin, ArgentinaFerrari,S. MarielBessone,Santiago Invertebrates La Casilda Mulanguiñeu Formation Chubut Basin Argentina A shallow marine invertebrate association is reported from a new Early Jurassic locality namely La Casilda, which is situated in the southwestern region of the Chubut Basin (Patagonia, Argentina). The marine deposits of La Casilda are located in the Río Genoa valley and bear a diverse invertebrate fauna including bivalves, gastropods, brachiopods, echinoderms and corals. A preliminary taxonomic analysis of the invertebrate fauna suggests that La Casilda deposits belong to the Mulanguiñeu Formation of late Pliensbachian-early Toarcian age, and may be coeval with those from the marine localities previously sampled in other regions of the Río Genoa valley. The preliminary results of a biodiversity analysis displayed that La Casilda is one of the most diverse localities at the Chubut Basin and could be assigned to the biofacies at the mixed siliciclastic-carbonate ramp proposed for the marine Early Jurassic at the Andean Basin of northern Chile. The evolution of the marine transgression during the early Pliensbachian-early Toarcian is also interpreted here in a time scale based on ammonite faunas, giving a preliminary temporal reconstruction of the entire Chubut Basin.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.42 n.3 20152015-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062015000300004en10.5027/andgeoV42n3-a04
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Invertebrates La Casilda Mulanguiñeu Formation Chubut Basin Argentina
spellingShingle	Invertebrates La Casilda Mulanguiñeu Formation Chubut Basin Argentina Ferrari,S. Mariel Bessone,Santiago A new Early Jurassic marine locality from southwestern Chubut Basin, Argentina
description	A shallow marine invertebrate association is reported from a new Early Jurassic locality namely La Casilda, which is situated in the southwestern region of the Chubut Basin (Patagonia, Argentina). The marine deposits of La Casilda are located in the Río Genoa valley and bear a diverse invertebrate fauna including bivalves, gastropods, brachiopods, echinoderms and corals. A preliminary taxonomic analysis of the invertebrate fauna suggests that La Casilda deposits belong to the Mulanguiñeu Formation of late Pliensbachian-early Toarcian age, and may be coeval with those from the marine localities previously sampled in other regions of the Río Genoa valley. The preliminary results of a biodiversity analysis displayed that La Casilda is one of the most diverse localities at the Chubut Basin and could be assigned to the biofacies at the mixed siliciclastic-carbonate ramp proposed for the marine Early Jurassic at the Andean Basin of northern Chile. The evolution of the marine transgression during the early Pliensbachian-early Toarcian is also interpreted here in a time scale based on ammonite faunas, giving a preliminary temporal reconstruction of the entire Chubut Basin.
author	Ferrari,S. Mariel Bessone,Santiago
author_facet	Ferrari,S. Mariel Bessone,Santiago
author_sort	Ferrari,S. Mariel
title	A new Early Jurassic marine locality from southwestern Chubut Basin, Argentina
title_short	A new Early Jurassic marine locality from southwestern Chubut Basin, Argentina
title_full	A new Early Jurassic marine locality from southwestern Chubut Basin, Argentina
title_fullStr	A new Early Jurassic marine locality from southwestern Chubut Basin, Argentina
title_full_unstemmed	A new Early Jurassic marine locality from southwestern Chubut Basin, Argentina
title_sort	new early jurassic marine locality from southwestern chubut basin, argentina
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062015000300004
work_keys_str_mv	AT ferrarismariel anewearlyjurassicmarinelocalityfromsouthwesternchubutbasinargentina AT bessonesantiago anewearlyjurassicmarinelocalityfromsouthwesternchubutbasinargentina AT ferrarismariel newearlyjurassicmarinelocalityfromsouthwesternchubutbasinargentina AT bessonesantiago newearlyjurassicmarinelocalityfromsouthwesternchubutbasinargentina
_version_	1714205850432700416

A new Early Jurassic marine locality from southwestern Chubut Basin, Argentina

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