Eocene carbonate sediments and sea-level changes on the NE part of the Adriatic carbonate platform (island of Hvar and Pelješac peninsula, Croatia)

Marjanac, Tihomir and Babac, Darinka and Benić, Josip and Ćosović, Vlasta and Drobne, Katica and Marjanac, Ljerka and Pavlovec, Rajko and Velimirović, Zora (1998) Eocene carbonate sediments and sea-level changes on the NE part of the Adriatic carbonate platform (island of Hvar and Pelješac peninsula, Croatia) . In: Paleogene Shallow Benthos of the Tethys (Dela-Opera Sazu 4.Razr). Slovenian Academy of Sciences & Art, Ljubljana, pp. 243-254. ISBN 961624213X

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Abstract

After the emersion of the Adriatic Platform that lasted since the end ofthe Senonian and after the local accumulation of bauxite, the sedimentation was reestablished in the Early Eocenei This occurred in more-or-less brackish, protected lagoons and bays, where Kozina-type Limestones have been deposited. These are overlain by the Foraminiferal Limestones of an open marine shelf which has been deposited above a ravinement surface. Deposition of the Eocene earbonates (Kozina-type Limestones in particular) is characterized by numerous breaks of sedimentation (hiati), some of which have lasted for ca. 2~2.5 Ma. These were caused by emersions in response to relative sea-level falls, and are documented by leached bedding planes, karstiñcation and occurrences of bauxite. Progressive deepening of the depositional environment is responsible for formation of the so-called Transitional Beds, again aborted by a sea-level fall which caused emersion and created a hiatus. Finally, a thick Flysch Formation was deposited in a deeper-marine basin which was created by tectonical disintegration of the Adriatic carbonate platform accompanied by a sea-level rise. The oldest part of the so-called Flysch Formation (predominantly marls) was deposited during a highstand, Whereas the youngest part characterized by turbidites was deposited during the sea-level lowstand. The reduced thickness ofthe sediments in the Hvar section is caused by comparatively slow subsidence, whereas thicker sediments in the Orebić section indicate higher subsidence of a more labile structural block.

Item Type: Book Section
Keywords: Stratigraphy, Eocene, paleoecology, sequence stratigraphy, inshore sections Hvar, Pelješac, Croatia
Date: 1998
Number of Pages: 346
Subjects: NATURAL SCIENCES > Geology
Divisions: Faculty of Science > Department of Geology
Publisher: Slovenian Academy of Sciences & Art
Depositing User: Sonja Borak
Date Deposited: 21 Feb 2014 09:53
Last Modified: 03 Mar 2014 08:37
URI: http://digre.pmf.unizg.hr/id/eprint/466

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