The oldest stratigraphic record of the Late Cretaceous shark Ptychodus mortoni Agassiz, from Vallecillo, Nuevo León, northeastern Mexico
In this paper we report the oldest geologic world record of Ptychodus mortoni, from the VallecilloMember (Agua Nueva Formation), at Vallecillo, Nuevo León, northeastern Mexico. The presence of theammonite Watinoceras coloradoense, allows the placement of the sediments of the Vallecillo memberwithin...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2007 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57224103 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57224103 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias de la Tierra shark Mexico Vallecillo lower Turonian Late Cretaceous |
| Sumario: | In this paper we report the oldest geologic world record of Ptychodus mortoni, from the VallecilloMember (Agua Nueva Formation), at Vallecillo, Nuevo León, northeastern Mexico. The presence of theammonite Watinoceras coloradoense, allows the placement of the sediments of the Vallecillo memberwithin the lower Turonian (Watinoceras coloradoense zone). With reference to this new data, the presenceof Ptychodus mortoni in the Vallecillo member extend the temporal distribution of this species into theearliest Turonian. Also, this study suggests that the utility of this shark species as biostratigraphic controlin late Cretaceous sediments should be revised in greater detail. |
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