Estudio cuantitativo de los foraminíferos planctónicos en el estratotipo de! límite Eoceno/Oligoceno en Massignano (Apeninos, Italia)
The quantitative study of the planktic Foraminifera from the Eocene/Oligocene boundary stratotype at Massignano (Apennines, Italy) has been accomplished for the first time, This study allow us to establish the fauna/ changes in the assemblages, showing a progressive decline of the surface dwellers,...
| Autores: | , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 1992 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | español |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/16339 |
| Acceso en línea: | http://hdl.handle.net/10272/16339 |
| Access Level: | acceso abierto |
| Palabra clave: | Planktic Foraminifera Biostratigraphy Chronostratigraphy Paleoecology Eocene Oligocene |
| Sumario: | The quantitative study of the planktic Foraminifera from the Eocene/Oligocene boundary stratotype at Massignano (Apennines, Italy) has been accomplished for the first time, This study allow us to establish the fauna/ changes in the assemblages, showing a progressive decline of the surface dwellers, which are the more tipicai Eocene species that disappear during the Late Eocene. The faunal change is gradual, it accelerates at the Eocene/Oligocene boundary, but there is not evidence of mass extinction. Nevertheless, these extinctions represent about 40% of the total species that lived during the Late Eocene and were partially replaced by oportunistic species. Besides, the quantitative study provides a base for a more rigorous biostratigraphy |
|---|