Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus

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Spitidiscus is a widely-distributed Hauterivian genus that briefly invaded the Neuquén Basin, Argentina, in mid Hauterivian times, well after it first evolved in the west Tethyan area. Its appearance in Argentina is linked with a globally-significant mid Hauterivian sea-level rise. This is marked in...

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Detalles Bibliográficos
Autores principales:	Rawson, P.F., Aguirre-Urreta, M.B.
Formato:	JOUR
Materias:	Ammonites Argentina Biostratigraphy Hauterivian Neuquén Basin Spitidiscus ammonite biostratigraphy Cretaceous facies marine sediment sea level Tethys
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_01956671_v33_n1_p97_Rawson
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_01956671_v33_n1_p97_Rawson2023-10-03T15:09:27Z Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus Rawson, P.F. Aguirre-Urreta, M.B. Ammonites Argentina Biostratigraphy Hauterivian Neuquén Basin Spitidiscus ammonite biostratigraphy Cretaceous facies Hauterivian marine sediment sea level Tethys Argentina Spitidiscus is a widely-distributed Hauterivian genus that briefly invaded the Neuquén Basin, Argentina, in mid Hauterivian times, well after it first evolved in the west Tethyan area. Its appearance in Argentina is linked with a globally-significant mid Hauterivian sea-level rise. This is marked in the basin by a sharp facies change in the Agrio Formation, from non-marine sandstones of the Avilé Member to marine sediments, often laminated black shales, with Spitidiscus at the base of the overlying Agua de la Mula Member. Our extensive field work has shown that Spitidiscus occurs across the whole basin, where it is represented by two species, Spitidiscus riccardii Leanza and Wiedmann and Spitidiscus kilapiae sp. nov. For most of its vertical range Spitidiscus occurs alone, characterising the S. riccardii Zone. But at the top of its range it is joined by the first crioceratitid ammonites, their appearance marking the base of the Crioceratites schlagintweiti Zone. © 2011 Elsevier Ltd. Fil:Aguirre-Urreta, M.B. 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_v33_n1_p97_Rawson
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Ammonites Argentina Biostratigraphy Hauterivian Neuquén Basin Spitidiscus ammonite biostratigraphy Cretaceous facies Hauterivian marine sediment sea level Tethys Argentina
spellingShingle	Ammonites Argentina Biostratigraphy Hauterivian Neuquén Basin Spitidiscus ammonite biostratigraphy Cretaceous facies Hauterivian marine sediment sea level Tethys Argentina Rawson, P.F. Aguirre-Urreta, M.B. Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus
topic_facet	Ammonites Argentina Biostratigraphy Hauterivian Neuquén Basin Spitidiscus ammonite biostratigraphy Cretaceous facies Hauterivian marine sediment sea level Tethys Argentina
description	Spitidiscus is a widely-distributed Hauterivian genus that briefly invaded the Neuquén Basin, Argentina, in mid Hauterivian times, well after it first evolved in the west Tethyan area. Its appearance in Argentina is linked with a globally-significant mid Hauterivian sea-level rise. This is marked in the basin by a sharp facies change in the Agrio Formation, from non-marine sandstones of the Avilé Member to marine sediments, often laminated black shales, with Spitidiscus at the base of the overlying Agua de la Mula Member. Our extensive field work has shown that Spitidiscus occurs across the whole basin, where it is represented by two species, Spitidiscus riccardii Leanza and Wiedmann and Spitidiscus kilapiae sp. nov. For most of its vertical range Spitidiscus occurs alone, characterising the S. riccardii Zone. But at the top of its range it is joined by the first crioceratitid ammonites, their appearance marking the base of the Crioceratites schlagintweiti Zone. © 2011 Elsevier Ltd.
format	JOUR
author	Rawson, P.F. Aguirre-Urreta, M.B.
author_facet	Rawson, P.F. Aguirre-Urreta, M.B.
author_sort	Rawson, P.F.
title	Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus
title_short	Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus
title_full	Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus
title_fullStr	Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus
title_full_unstemmed	Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus
title_sort	lower cretaceous ammonites from the neuquén basin, argentina: the hauterivian genus spitidiscus
url	http://hdl.handle.net/20.500.12110/paper_01956671_v33_n1_p97_Rawson
work_keys_str_mv	AT rawsonpf lowercretaceousammonitesfromtheneuquenbasinargentinathehauteriviangenusspitidiscus AT aguirreurretamb lowercretaceousammonitesfromtheneuquenbasinargentinathehauteriviangenusspitidiscus
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Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus

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