Towards a standard ammonite zonation for the Aptian (Lower Cretaceous) of northern Mexico
Detailed data on twenty-seven species of ammonites identified in three stratigraphic sections ofnorthern Mexico, allow further refinement of the Aptian ammonite biozonations of previous authors. Fourformal ammonite biozones are proposed. Dufrenoyia justinae Taxon-Range-Zone for the uppermost partof...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2005 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57222105 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57222105 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias de la Tierra Aptian Mexico ammonites biostratigraphy |
| Sumario: | Detailed data on twenty-seven species of ammonites identified in three stratigraphic sections ofnorthern Mexico, allow further refinement of the Aptian ammonite biozonations of previous authors. Fourformal ammonite biozones are proposed. Dufrenoyia justinae Taxon-Range-Zone for the uppermost partof the lower Aptian (Bedoulian), Epicheloniceras cf. subnodosocostatum/Acanthohoplites acutecostaInterval Zone representative of the middle Aptian (Gargasian), and Acanthohoplites aschiltaensis andHypacanthoplites cf. leanzae Taxon-Range-Zones, spanning the upper Aptian (Clansayesian). Theammonite zonation proposed represents the advancements on the development of a standard schemetowards a reliable correlation with the biozonal scheme of England and the ammonite zonal standardof the Mediterranean area. |
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