An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)

Late Floian conodonts are recorded from a thin limestone lens intercalated in the lower part of the San José Formation at the Carcel Puncco section (Inambari River), Eastern Cordillera of Peru. The conodont association includes Gothodus costulatus LINDSTRÖM, Protopanderodus rectus (LINDSTRÖM), Drepa...

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Autores: Gutiérrez-Marco, J. C., Albanesi, G. L., Sarmiento, Graciela N., Carlotto, Víctor
Tipo de recurso: artículo
Fecha de publicación:2008
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/5366
Acceso en línea:http://hdl.handle.net/10261/5366
Access Level:acceso abierto
Palabra clave:Conodonts
Lower Ordovician
Paleogeography
Gondwana
Peru
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spelling An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)Gutiérrez-Marco, J. C.Albanesi, G. L.Sarmiento, Graciela N.Carlotto, VíctorConodontsLower OrdovicianPaleogeographyGondwanaPeruLate Floian conodonts are recorded from a thin limestone lens intercalated in the lower part of the San José Formation at the Carcel Puncco section (Inambari River), Eastern Cordillera of Peru. The conodont association includes Gothodus costulatus LINDSTRÖM, Protopanderodus rectus (LINDSTRÖM), Drepanoistodus basiovalis (SERGEEVA), Drepanoistodus forceps (LINDSTRÖM), Drepanodus arcuatus PANDER, Trapezognathus diprion (LINDSTRÖM), Erraticodon patu COOPER, and Ansella cf. jemtlandica (LÖFGREN). This species association can be assigned to the upper part of the well-documented Oepikodus evae Zone. It is the northernmost conodont record of late Floian age in South America. This study updates the preliminary data presented in 2001 from this fossil locality, and it has important consequences for the paleogeographic reconstruction of the Peruvian part of the Central Andean Basin. In accordance with trilobites and brachiopods documented for the same strata, the conodont association represents a relatively cold-shallow-water platform environment. The record of late Floian conodonts towards the middle part of the San José Formation shows that the base of this unit in the studied section is considerably older than other sections of the distribution area, where its lowermost part is dated as early Darriwilian by the record of graptolites from the Undulograptus austrodentatus graptolite Zone. The diachronous initiation of the marine sedimentation makes the lower part of the Carcel Puncco shales penecontemporaneous with the volcanigenic rocks related with the Arequipa Massif, which transitionally underlie the San José Formation in other places of the Altiplano and the Eastern Cordillera of Peru.This research work has been funded by the AECI (Spanish Agency for International Cooperation) and the Research Group on Perigondwanan Precambrian and Paleozoic of the Universidad Complutense (Madrid, Spain). José Cárdenas (Universidad Nacional San Antonio Abad, Cuzco, Peru) and Dr. Enrique Díaz Martínez (Spanish Geological Survey-IGME, Madrid) are thanked for valuable assistance during the expeditions of 2002 and 2004. Guillermo L. Albanesi thanks especially the CONICET and ANPCyT (FONCyT), Argentina, for continuous support of his conodont studies. The referees of this paper, Svend Stouge (Copenhagen, Denmark), Stig M. Bergström (Columbus, Ohio, USA), and Yong Yi Zhen (Sydney, Australia), are greatly acknowledged for their recommendations in order to improve the final version. This paper is a contribution to the IGCP project 503.Peer reviewedCSIC - Instituto de Ciencias de la Tierra Jaume Almera (ICTJA)200820082008info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501736102 bytesapplication/pdfhttp://hdl.handle.net/10261/5366reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://www.geologica-acta.com/MostrarAbstractAC.do?abstract=gav0602a04info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/53662026-05-22T06:33:51Z
dc.title.none.fl_str_mv An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)
title An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)
spellingShingle An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)
Gutiérrez-Marco, J. C.
Conodonts
Lower Ordovician
Paleogeography
Gondwana
Peru
title_short An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)
title_full An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)
title_fullStr An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)
title_full_unstemmed An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)
title_sort An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)
dc.creator.none.fl_str_mv Gutiérrez-Marco, J. C.
Albanesi, G. L.
Sarmiento, Graciela N.
Carlotto, Víctor
author Gutiérrez-Marco, J. C.
author_facet Gutiérrez-Marco, J. C.
Albanesi, G. L.
Sarmiento, Graciela N.
Carlotto, Víctor
author_role author
author2 Albanesi, G. L.
Sarmiento, Graciela N.
Carlotto, Víctor
author2_role author
author
author
dc.subject.none.fl_str_mv Conodonts
Lower Ordovician
Paleogeography
Gondwana
Peru
topic Conodonts
Lower Ordovician
Paleogeography
Gondwana
Peru
description Late Floian conodonts are recorded from a thin limestone lens intercalated in the lower part of the San José Formation at the Carcel Puncco section (Inambari River), Eastern Cordillera of Peru. The conodont association includes Gothodus costulatus LINDSTRÖM, Protopanderodus rectus (LINDSTRÖM), Drepanoistodus basiovalis (SERGEEVA), Drepanoistodus forceps (LINDSTRÖM), Drepanodus arcuatus PANDER, Trapezognathus diprion (LINDSTRÖM), Erraticodon patu COOPER, and Ansella cf. jemtlandica (LÖFGREN). This species association can be assigned to the upper part of the well-documented Oepikodus evae Zone. It is the northernmost conodont record of late Floian age in South America. This study updates the preliminary data presented in 2001 from this fossil locality, and it has important consequences for the paleogeographic reconstruction of the Peruvian part of the Central Andean Basin. In accordance with trilobites and brachiopods documented for the same strata, the conodont association represents a relatively cold-shallow-water platform environment. The record of late Floian conodonts towards the middle part of the San José Formation shows that the base of this unit in the studied section is considerably older than other sections of the distribution area, where its lowermost part is dated as early Darriwilian by the record of graptolites from the Undulograptus austrodentatus graptolite Zone. The diachronous initiation of the marine sedimentation makes the lower part of the Carcel Puncco shales penecontemporaneous with the volcanigenic rocks related with the Arequipa Massif, which transitionally underlie the San José Formation in other places of the Altiplano and the Eastern Cordillera of Peru.
publishDate 2008
dc.date.none.fl_str_mv 2008
2008
2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/5366
url http://hdl.handle.net/10261/5366
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://www.geologica-acta.com/MostrarAbstractAC.do?abstract=gav0602a04
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv CSIC - Instituto de Ciencias de la Tierra Jaume Almera (ICTJA)
publisher.none.fl_str_mv CSIC - Instituto de Ciencias de la Tierra Jaume Almera (ICTJA)
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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