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, R.A., Concheyro, A., Aberhan, M., Hecht, L., Medina, F.A., Tagle, R.
Formato:	JOUR
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:	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	todo:paper_01956671_v26_n2_p283_Scasso
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spelling	todo:paper_01956671_v26_n2_p283_Scasso2023-10-03T15:09:21Z A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina Scasso, R.A. Concheyro, A. Aberhan, M. Hecht, L. Medina, F.A. Tagle, R. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, R.A. Concheyro, A. Aberhan, M. Hecht, L. Medina, F.A. Tagle, R. 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.
format	JOUR
author	Scasso, R.A. Concheyro, A. Aberhan, M. Hecht, L. Medina, F.A. Tagle, R.
author_facet	Scasso, R.A. Concheyro, A. Aberhan, M. Hecht, L. Medina, F.A. Tagle, R.
author_sort	Scasso, R.A.
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
url	http://hdl.handle.net/20.500.12110/paper_01956671_v26_n2_p283_Scasso
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A tsunami deposit at the Cretaceous/Paleogene boundary in the Neuquén Basin of Argentina

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