NDLI: A facies model for an Early Aptian carbonate platform (Zamaia, Spain)

Content Provider	Springer Nature Link
Author	Fernández Mendiola, Pedro Angel Mendicoa, Jone Hernandez, Sergio Owen, Hugh G. García Mondéjar, Joaquín
Copyright Year	2012
Abstract	The Cretaceous (Early Aptian, uppermost Bedoulian, Dufrenoyia furcata Zone) Zamaia Formation is a carbonate unit, up to 224 m thick and 1.5 km wide, which formed on a regional coastal sea bordering the continental Iberian craton. A high-resolution, facies-based, stratigraphic framework is presented using facies mapping and vertical-log characterization. The depositional succession consists of a shallow estuarine facies of the Ereza Fm overlain by shallow-water rudist limestones (Zamaia Fm) building relief over positive tectonic blocks and separated by an intraplatform depression. The margins of these shallow-water rudist buildups record low-angle transitional slopes toward the adjacent surrounding basins. Syn-depositional faulting is responsible for differential subsidence and creation of highs and lows, and local emplacement of limestone olistoliths and slope breccias. Two main carbonate phases are separated by an intervening siliciclastic-carbonate estuarine episode. The platform carbonates are composed of repetitive swallowing-upward cycles, commonly ending with a paleokarstic surface. Depositional systems tracts within sequences are recognized on the basis of facies patterns and are interpreted in terms of variations of relative sea level. Both Zamaia carbonate platform phases were terminated by a relative sea-level fall and karstification, immediately followed by a relative sea-level rise. This study refines our understanding of the paleogeography and sea-level history in the Early Cretaceous Aptian of the Basque-Cantabrian Basin. The detailed information on biostratigraphy and lithostratigraphy provides a foundation for regional to global correlations.
Starting Page	529
Ending Page	558
Page Count	30
File Format	PDF
ISSN	01729179
Journal	Facies
Volume Number	59
Issue Number	3
e-ISSN	16124820
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-07-17
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Early Aptian Carbonate platforms Basque-Cantabrian Basin Stratigraphy Facies analysis Depositional sequences Sedimentology Biogeosciences Geochemistry Paleontology Ecology
Content Type	Text
Resource Type	Article
Subject	Geology Stratigraphy Paleontology

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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