English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/156979
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Messinian pre-evaporite sapropels and precession-induced oscillations in western Mediterranean climate

AuthorsSierro, Francisco Javier; Flores, J. A.; Zamarreño, I. ; Vázquez, Antonio ; Utrilla, Rosa ; Francés, G.; Hilgen, F.; Krijgsman, W.
Keywordsplanktic foraminifera
Issue Date1999
CitationMarine Geology 153: 137-146 (1999)
AbstractCyclical fluctuations in planktic foraminiferal assemblages have been recognized in the pre-evaporitic Messinian in a marginal basin of the western Mediterranean. The fluctuations coincide with a dominantly precession-controlled sedimentary cyclicity (sapropels). During sapropel deposition, high planktic foraminiferal diversities are indicative of relatively stable marine conditions, while during homogeneous marl deposition low diversities seem to indicate the presence of unfavourable, more saline surface water conditions. The dominance of a precession-related signal indicates that regional climate oscillations rather than (obliquity-related) glacio-eustatically controlled influxes of Atlantic and/or Mediterranean waters are responsible for the faunal fluctuations and sedimentary cyclicity. Our scenario links the persistence of normal marine conditions during sapropel formation with increased rainfall and run-off along the western Mediterranean at times that perihelion occurred in Northern Hemisphere summer. Less favourable, highly saline surface water conditions prevailed during periods of drier climate induced by opposite precessional extremes. The cyclical oceanographic fluctuations could also have governed periodic reef growth along the margins.
Identifiersdoi: 10.1016/S0025-3227(98)00085-1
issn: 0025-3227
Appears in Collections:(Geo3Bcn) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.