A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina

A coarse-grained sandstone bed of Cretaceous/Paleogene (K/Pg) boundary age occurs in a homogeneous neritic shelf mudstone sequence (Jagüel Formation) in the Neuquén Basin of Argentina. This bed, 15 - 25 cm thick, contains abundant plagioclase, broken shells and sharks' teeth. Sedimentological f...

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Autores principales:	Scasso, Roberto Adrian, Concheyro, Graciela Andrea, Medina, Francisco Alberto
Publicado:	2005
Materias:	Argentina Cretaceous/Paleogene boundary Mass extinction Patagonia Tsunami Cretaceous-Tertiary boundary mass extinction meteorite storm deposit tsunami Neuquen Basin South America Western Hemisphere World Chondrichthyes
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v26_n2_p283_Scasso http://hdl.handle.net/20.500.12110/paper_01956671_v26_n2_p283_Scasso
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_01956671_v26_n2_p283_Scasso
record_format	dspace
spelling	paper:paper_01956671_v26_n2_p283_Scasso2023-06-08T15:20:09Z A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina Scasso, Roberto Adrian Concheyro, Graciela Andrea Medina, Francisco Alberto Argentina Cretaceous/Paleogene boundary Mass extinction Patagonia Tsunami Cretaceous-Tertiary boundary mass extinction meteorite storm deposit tsunami Argentina Neuquen Basin South America Western Hemisphere World Chondrichthyes A coarse-grained sandstone bed of Cretaceous/Paleogene (K/Pg) boundary age occurs in a homogeneous neritic shelf mudstone sequence (Jagüel Formation) in the Neuquén Basin of Argentina. This bed, 15 - 25 cm thick, contains abundant plagioclase, broken shells and sharks' teeth. Sedimentological features include an erosive base, abundant rip-up clasts, normal grading and hummocky cross-bedding. The K/Pg boundary age of the bed was confirmed by calcareous nannofossils. Similar to other sections in the Gulf Coast region and the Danish Basin, a "dead zone" significantly depleted in macrofossils is evident in the basal 1 m above the clastic layer. In combination, these features suggest that the clastic layer represents a tsunami deposit that was related to the Chicxulub impact event in Yucatan/Mexico. Mechanisms of tsunami wave amplification in this extremely distal and somewhat protected setting are poorly understood but the funnel-shape of the basin may have promoted the unusually strong sedimentological response. © 2005 Elsevier Ltd. All rights reserved. Fil:Scasso, R.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Concheyro, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Medina, F.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v26_n2_p283_Scasso http://hdl.handle.net/20.500.12110/paper_01956671_v26_n2_p283_Scasso
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Argentina Cretaceous/Paleogene boundary Mass extinction Patagonia Tsunami Cretaceous-Tertiary boundary mass extinction meteorite storm deposit tsunami Argentina Neuquen Basin South America Western Hemisphere World Chondrichthyes
spellingShingle	Argentina Cretaceous/Paleogene boundary Mass extinction Patagonia Tsunami Cretaceous-Tertiary boundary mass extinction meteorite storm deposit tsunami Argentina Neuquen Basin South America Western Hemisphere World Chondrichthyes Scasso, Roberto Adrian Concheyro, Graciela Andrea Medina, Francisco Alberto A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina
topic_facet	Argentina Cretaceous/Paleogene boundary Mass extinction Patagonia Tsunami Cretaceous-Tertiary boundary mass extinction meteorite storm deposit tsunami Argentina Neuquen Basin South America Western Hemisphere World Chondrichthyes
description	A coarse-grained sandstone bed of Cretaceous/Paleogene (K/Pg) boundary age occurs in a homogeneous neritic shelf mudstone sequence (Jagüel Formation) in the Neuquén Basin of Argentina. This bed, 15 - 25 cm thick, contains abundant plagioclase, broken shells and sharks' teeth. Sedimentological features include an erosive base, abundant rip-up clasts, normal grading and hummocky cross-bedding. The K/Pg boundary age of the bed was confirmed by calcareous nannofossils. Similar to other sections in the Gulf Coast region and the Danish Basin, a "dead zone" significantly depleted in macrofossils is evident in the basal 1 m above the clastic layer. In combination, these features suggest that the clastic layer represents a tsunami deposit that was related to the Chicxulub impact event in Yucatan/Mexico. Mechanisms of tsunami wave amplification in this extremely distal and somewhat protected setting are poorly understood but the funnel-shape of the basin may have promoted the unusually strong sedimentological response. © 2005 Elsevier Ltd. All rights reserved.
author	Scasso, Roberto Adrian Concheyro, Graciela Andrea Medina, Francisco Alberto
author_facet	Scasso, Roberto Adrian Concheyro, Graciela Andrea Medina, Francisco Alberto
author_sort	Scasso, Roberto Adrian
title	A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina
title_short	A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina
title_full	A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina
title_fullStr	A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina
title_full_unstemmed	A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina
title_sort	tsunami deposit at the cretaceous/paleogene boundary in the neuquén basin of argentina
publishDate	2005
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v26_n2_p283_Scasso http://hdl.handle.net/20.500.12110/paper_01956671_v26_n2_p283_Scasso
work_keys_str_mv	AT scassorobertoadrian atsunamidepositatthecretaceouspaleogeneboundaryintheneuquenbasinofargentina AT concheyrogracielaandrea atsunamidepositatthecretaceouspaleogeneboundaryintheneuquenbasinofargentina AT medinafranciscoalberto atsunamidepositatthecretaceouspaleogeneboundaryintheneuquenbasinofargentina AT scassorobertoadrian tsunamidepositatthecretaceouspaleogeneboundaryintheneuquenbasinofargentina AT concheyrogracielaandrea tsunamidepositatthecretaceouspaleogeneboundaryintheneuquenbasinofargentina AT medinafranciscoalberto tsunamidepositatthecretaceouspaleogeneboundaryintheneuquenbasinofargentina
_version_	1768544954142949376

A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina

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