Astronomical cyclicity and sapropels in the pre-evaporitic Messinian of the Sorbas basin (Western Mediterranean)
A high resolution study of the Messinian pre-evaporitic maris of the Sorbas basin was carried out with the main object of analysing the high frequency cyclicity identified in this basin, in the lower part of the succession, sedimentary cycles are characterised by an alternation of indurated, opal-ri...
| Autores: | , , , , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 1996 |
| País: | España |
| Recursos: | Universidad de Huelva (UHU) |
| Repositório: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglês |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/11075 |
| Acesso em linha: | http://hdl.handle.net/10272/11075 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Astronomic cycles Sapropels Planktic foraminifera Nannofossils Messinian Spain Western Mediterranean |
| Resumo: | A high resolution study of the Messinian pre-evaporitic maris of the Sorbas basin was carried out with the main object of analysing the high frequency cyclicity identified in this basin, in the lower part of the succession, sedimentary cycles are characterised by an alternation of indurated, opal-rich layers and homogeneous maris. In the upper part, sapropels have been identified in the middle part of the cycles. These cycles have an average duration of23,500 years and therefore a relation to precession variations in the Earth's orbit may be inferred. Quantitative analyses of the planktic Foraminifera and Nan no fossil assemblages suggest the occurrence of strong environmental fluctuations in the basin before the Messinian Salinity Crisis |
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