Lithofacies, palaeoecology and palaeoenvironments of the Agrio Formation, Lower Cretaceous of the Neuquén Basin, Argentina

The lithofacies and macrofossil guilds of the Agrio Formation (Upper Valanginian-Lower Barremian) have been analysed using evidence from sedimentological, taphonomic and palaeoecological studies. The study area is Agua de la Mula and adjacent regions in central Neuquén. Seven lithofacies have been r...

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Detalles Bibliográficos
Publicado:	2005
Materias:	basin fill Cretaceous facies analysis paleoecology paleoenvironment Argentina Neuquen Basin South America Anthozoa
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v252_n_p295_Lazo http://hdl.handle.net/20.500.12110/paper_03058719_v252_n_p295_Lazo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_03058719_v252_n_p295_Lazo
record_format	dspace
spelling	paper:paper_03058719_v252_n_p295_Lazo2023-06-08T15:30:55Z Lithofacies, palaeoecology and palaeoenvironments of the Agrio Formation, Lower Cretaceous of the Neuquén Basin, Argentina basin fill Cretaceous facies analysis paleoecology paleoenvironment Argentina Neuquen Basin South America Anthozoa The lithofacies and macrofossil guilds of the Agrio Formation (Upper Valanginian-Lower Barremian) have been analysed using evidence from sedimentological, taphonomic and palaeoecological studies. The study area is Agua de la Mula and adjacent regions in central Neuquén. Seven lithofacies have been recognized in the field, which indicate that the Agrio Formation was deposited in an open-marine, ramp depositional system under storm influence. Lithofacies indicate conditions that range from low-energy basin to high-energy inner ramp. Outer and mid-ramp deposits are the most abundant. Macrofossils have been grouped into 16 guilds based on tiering, life habit and feeding category. The guilds indicate normal benthic oxygen level, normal salinity, and soft-firm muddy and sandy bottoms. Suspension-feeders are more common than deposit-feeders suggesting the predominance of suspended food particles over deposited food resources. A low input of siliciclastics and, possibly, other palaeoceanographic conditions allowed the development of oolitic facies in the inner ramp and coral patch reefs in the upper mid-ramp for a limited period of time. © The Geological Society of London 2005. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v252_n_p295_Lazo http://hdl.handle.net/20.500.12110/paper_03058719_v252_n_p295_Lazo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	basin fill Cretaceous facies analysis paleoecology paleoenvironment Argentina Neuquen Basin South America Anthozoa
spellingShingle	basin fill Cretaceous facies analysis paleoecology paleoenvironment Argentina Neuquen Basin South America Anthozoa Lithofacies, palaeoecology and palaeoenvironments of the Agrio Formation, Lower Cretaceous of the Neuquén Basin, Argentina
topic_facet	basin fill Cretaceous facies analysis paleoecology paleoenvironment Argentina Neuquen Basin South America Anthozoa
description	The lithofacies and macrofossil guilds of the Agrio Formation (Upper Valanginian-Lower Barremian) have been analysed using evidence from sedimentological, taphonomic and palaeoecological studies. The study area is Agua de la Mula and adjacent regions in central Neuquén. Seven lithofacies have been recognized in the field, which indicate that the Agrio Formation was deposited in an open-marine, ramp depositional system under storm influence. Lithofacies indicate conditions that range from low-energy basin to high-energy inner ramp. Outer and mid-ramp deposits are the most abundant. Macrofossils have been grouped into 16 guilds based on tiering, life habit and feeding category. The guilds indicate normal benthic oxygen level, normal salinity, and soft-firm muddy and sandy bottoms. Suspension-feeders are more common than deposit-feeders suggesting the predominance of suspended food particles over deposited food resources. A low input of siliciclastics and, possibly, other palaeoceanographic conditions allowed the development of oolitic facies in the inner ramp and coral patch reefs in the upper mid-ramp for a limited period of time. © The Geological Society of London 2005.
title	Lithofacies, palaeoecology and palaeoenvironments of the Agrio Formation, Lower Cretaceous of the Neuquén Basin, Argentina
title_short	Lithofacies, palaeoecology and palaeoenvironments of the Agrio Formation, Lower Cretaceous of the Neuquén Basin, Argentina
title_full	Lithofacies, palaeoecology and palaeoenvironments of the Agrio Formation, Lower Cretaceous of the Neuquén Basin, Argentina
title_fullStr	Lithofacies, palaeoecology and palaeoenvironments of the Agrio Formation, Lower Cretaceous of the Neuquén Basin, Argentina
title_full_unstemmed	Lithofacies, palaeoecology and palaeoenvironments of the Agrio Formation, Lower Cretaceous of the Neuquén Basin, Argentina
title_sort	lithofacies, palaeoecology and palaeoenvironments of the agrio formation, lower cretaceous of the neuquén basin, argentina
publishDate	2005
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v252_n_p295_Lazo http://hdl.handle.net/20.500.12110/paper_03058719_v252_n_p295_Lazo
_version_	1768542269352181760

Lithofacies, palaeoecology and palaeoenvironments of the Agrio Formation, Lower Cretaceous of the Neuquén Basin, Argentina

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