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

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
Autor principal: Aguirre-Urreta, Maria Beatriz
Publicado: 2012
Materias:
Ammonites
Argentina
Biostratigraphy
Hauterivian
Neuquén Basin
Spitidiscus
ammonite
biostratigraphy
Cretaceous
facies
marine sediment
sea level
Tethys
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v33_n1_p97_Rawson
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
id paper:paper_01956671_v33_n1_p97_Rawson
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spelling paper:paper_01956671_v33_n1_p97_Rawson2023-06-08T15:20:14Z Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus Aguirre-Urreta, Maria Beatriz 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. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v33_n1_p97_Rawson 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
Aguirre-Urreta, Maria Beatriz
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.
author Aguirre-Urreta, Maria Beatriz
author_facet Aguirre-Urreta, Maria Beatriz
author_sort Aguirre-Urreta, Maria Beatriz
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
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v33_n1_p97_Rawson
http://hdl.handle.net/20.500.12110/paper_01956671_v33_n1_p97_Rawson
work_keys_str_mv AT aguirreurretamariabeatriz lowercretaceousammonitesfromtheneuquenbasinargentinathehauteriviangenusspitidiscus
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