English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/162022
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)

AuthorsArmenteros, I.; Bustillo, Mª Ángeles ; Huerta, P.
Gypsum calcitization
Issue Date2006
PublisherSociedad Geológica de España
CitationGeotemas 9, 25-30
AbstractThe Deza Formation shows a singular succession in a southern outcrop between Cihuela and Embid. The lower two thirds of the unit are characterised by the abundance of carbonate lacustrine facies alternating with carbonate palustrine ones rich in calcite pseudomorphs after microcrystalline lenticular gypsum, and the presence of lignite in the lower levels of the unit. These facies are arranged in cycles with variable thickness (from 2 to 8 m) consisting of lacustrine fossiliferous marls/soft limestones alternating with palustrine limestone leveIs and shapes of ancient gypsum. These cycles are probably caused by climatic oscillations between humid and dry conditions represented by exposure facies and interstitial gypsum precipitation. The presence of perennial lacustrine facies in this location next to the carbonate Cretaceous paleorelief might be influenced by the abundance of water from springs on this paleorelief. The upper third of the unit consists of a repetition of carbonate palustrine cye/es with some intercalated calcrete levels at the top of the succession. The replacement of gypsum by calcite might occur both during burial and significantly later during uplift and exposure. The petrographic characteristics of the chert nodules indicate an origin that postdates to the calcitization of gypsum.
Appears in Collections:(MNCN) Libros y partes de libros
Files in This Item:
File Description SizeFormat 
2006 Armenteros Bustillo Huerta Geotem.pdf3,29 MBAdobe PDFThumbnail
Show full item record

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