English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/5366
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título : An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)
Autor : Gutiérrez-Marco, J. C.; Albanesi, G. L.; Sarmiento, Graciela N.; Carlotto, Víctor
Palabras clave : Conodonts
Lower Ordovician
Paleogeography
Gondwana
Peru
Fecha de publicación : 2008
Editor: CSIC - Instituto de Ciencias de la Tierra Jaume Almera (ICTJA)
Citación : Geologica Acta, Vol.6, Nº 2, June 2008, 147-160
Resumen: 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.
Versión del editor: http://www.geologica-acta.com/MostrarAbstractAC.do?abstract=gav0602a04
URI : http://hdl.handle.net/10261/5366
ISSN: 1695-6133
Aparece en las colecciones: (IGE) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
vol0602a04.pdf718,85 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.