The ammonite sequence in the Agrio Formation (Lower Cretaceous), Neuquén Basin, Argentina

The Agrio Formation of the Neuquén Basin, Argentina, contains an extensive sequence of ammonite faunas, most of which are monogeneric. Detailed collecting through 15 sections across the basin has facilitated a major revision of the ammonite zonation. Formerly embracing four broad zones, the Agrio Fo...

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Guardado en:
Detalles Bibliográficos
Publicado: 1997
Materias:
ammonite
biostratigraphy
Cretaceous
Argentina, Neuquen Basin
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v134_n4_p449_AguirreUrreta
http://hdl.handle.net/20.500.12110/paper_00167568_v134_n4_p449_AguirreUrreta
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00167568_v134_n4_p449_AguirreUrreta
record_format dspace
spelling paper:paper_00167568_v134_n4_p449_AguirreUrreta2023-06-08T14:38:49Z The ammonite sequence in the Agrio Formation (Lower Cretaceous), Neuquén Basin, Argentina ammonite biostratigraphy Cretaceous Argentina, Neuquen Basin The Agrio Formation of the Neuquén Basin, Argentina, contains an extensive sequence of ammonite faunas, most of which are monogeneric. Detailed collecting through 15 sections across the basin has facilitated a major revision of the ammonite zonation. Formerly embracing four broad zones, the Agrio Formation is now divided into nine zones, the lowest four of which are divided into a total of 11 subzones. The new zonation provides a standard against which other South American faunas can be compared. The degree of subdivision now achieved is comparable to that for the 'standard' sequences of the West Mediterranean region. Although it is not possible to correlate the two regions in detail, the occurrence of some widely distributed genera (Olcostephanus, Karakaschiceras, Oosterella, Spitidiscus and Crioceratites) at well-defined levels in the Neuquén Basin provides some crucial links. Thus the approximate positions of the Lower/Upper Valanginian, Valanginian/Hauterivian and Lower/Upper Hauterivian boundaries can be determined. 1997 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v134_n4_p449_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00167568_v134_n4_p449_AguirreUrreta
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic ammonite
biostratigraphy
Cretaceous
Argentina, Neuquen Basin
spellingShingle ammonite
biostratigraphy
Cretaceous
Argentina, Neuquen Basin
The ammonite sequence in the Agrio Formation (Lower Cretaceous), Neuquén Basin, Argentina
topic_facet ammonite
biostratigraphy
Cretaceous
Argentina, Neuquen Basin
description The Agrio Formation of the Neuquén Basin, Argentina, contains an extensive sequence of ammonite faunas, most of which are monogeneric. Detailed collecting through 15 sections across the basin has facilitated a major revision of the ammonite zonation. Formerly embracing four broad zones, the Agrio Formation is now divided into nine zones, the lowest four of which are divided into a total of 11 subzones. The new zonation provides a standard against which other South American faunas can be compared. The degree of subdivision now achieved is comparable to that for the 'standard' sequences of the West Mediterranean region. Although it is not possible to correlate the two regions in detail, the occurrence of some widely distributed genera (Olcostephanus, Karakaschiceras, Oosterella, Spitidiscus and Crioceratites) at well-defined levels in the Neuquén Basin provides some crucial links. Thus the approximate positions of the Lower/Upper Valanginian, Valanginian/Hauterivian and Lower/Upper Hauterivian boundaries can be determined.
title The ammonite sequence in the Agrio Formation (Lower Cretaceous), Neuquén Basin, Argentina
title_short The ammonite sequence in the Agrio Formation (Lower Cretaceous), Neuquén Basin, Argentina
title_full The ammonite sequence in the Agrio Formation (Lower Cretaceous), Neuquén Basin, Argentina
title_fullStr The ammonite sequence in the Agrio Formation (Lower Cretaceous), Neuquén Basin, Argentina
title_full_unstemmed The ammonite sequence in the Agrio Formation (Lower Cretaceous), Neuquén Basin, Argentina
title_sort ammonite sequence in the agrio formation (lower cretaceous), neuquén basin, argentina
publishDate 1997
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v134_n4_p449_AguirreUrreta
http://hdl.handle.net/20.500.12110/paper_00167568_v134_n4_p449_AguirreUrreta
_version_ 1768546190461239296

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