Universidad Complutense de Madrid
E-Prints Complutense

Dimorphinites (Ammonoidea, Jurassic, Upper Bajocian) in the Precordillera of Northern Chile

Impacto

Descargas

Último año



Fernández López, Sixto Rafael y Chong Díaz, Guillermo B. (2011) Dimorphinites (Ammonoidea, Jurassic, Upper Bajocian) in the Precordillera of Northern Chile. Journal of paleontology, 85 (3). pp. 395-405. ISSN 0022-3360

[img] PDF
2MB

URL Oficial: http://www.psjournals.org/loi/pleo



Resumen

A new upper Bajocian ammonite assemblage containing the morphoceratids Dimorphinites dimorphus
(d’Orbigny) and Vigoriceras defrancei (d’Orbigny) is reported from the circum-Pacific area. These ammonites were
found at the top of the Torcazas Formation, in the Quebrada San Pedro area, Precordillera of northern Chile.
Taphonomic, systematic, and paleobiogeographic data confirm these dimorphs were part of indigenous populations
within the Tarapaca Basin, belonging to the same demic biospecies: Dimorphinites defrancei (d’Orbigny). The West
Tethyan and East-Pacific distribution of D. defrancei corroborates the availability of the migratory seaway, the socalled
Hispanic Corridor, between the western Tethys and the eastern Pacific Ocean during the upper Bajocian
Parkinsoni Zone. The discovery of this upper Bajocian Dimorphinites assemblage provides a new biochronostratigraphic
horizon in the Tarapaca Basin and an interoceanic correlation point for the latest Bajocian.


Tipo de documento:Artículo
Palabras clave:Ammonoidea, Jurassic, Upper Bajocian, Northern Chile
Materias:Ciencias > Geología > Paleontología
Código ID:24098
Depositado:07 Ene 2014 13:16
Última Modificación:11 Dic 2018 08:42

Descargas en el último año

Sólo personal del repositorio: página de control del artículo