Upper cretaceous and eocene limestones of Vir island

Britvić, Valentina (2015) Upper cretaceous and eocene limestones of Vir island. Diploma thesis, Faculty of Science > Department of Geology.

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Abstract

Studied deposits on the island Vir are analysed micropaleontologically and sedimentologically. Twelve different mikrofacies were determined. The age of deposits were confirmed by conductive fossils. Upper Cenomanian deposits are the oldest with index fossils Chrysalidina gradata and Broeckina (Pastrikella) balcanica. Further more are Lower Turonian deposits with Marginotruncana schneegansi and Whiteinella cf. baltica, and Middle Turonian-Coniacian deposits with Scandonea samnitica, Moncharmotia apenninica and Dicyclina schlumbergeri. Eocene deposits transgresivlly comes the Cretaceous deposits. The Eocene age starts with, Cuisian, Lower Eocene deposits which age confirmed with fossils Chrysalidina cf. alva, C. makarskae, Coskinolina liburnica, C. douvillei and Discocyclina sp. Lutetian, Middle Eocene age of deposits confirmed with fossils Orbitoclypeus douvillei, Asterocyclina sp. and Discocyclina sp. Upper Cretaceous sediments were deposited in shallow subtidal environment, charaterized by laminated and non-laminated limestones similar structural caracteristics, except in the Lower Turonian when the deposits area are flooded platform. Eocene sediments are deposited within subtidal environment which gradually become deeper, as seen through the microfosils association of larger benthic foraminifera, and pelagic foraminifera within the uppermost part of Eocene limestones.

Item Type: Thesis (Diploma thesis)
Keywords: Upper Cretaceous, Eocene, microfacies, Vir island
Supervisor: Moro, Alan
Date: 2015
Number of Pages: 31
Subjects: NATURAL SCIENCES > Geology
NATURAL SCIENCES > Geology > Mineralogy and Petrology
Divisions: Faculty of Science > Department of Geology
Depositing User: Danica Vujičić
Date Deposited: 21 Sep 2015 10:54
Last Modified: 21 Sep 2015 10:54
URI: http://digre.pmf.unizg.hr/id/eprint/4231

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