Mikrofosilne zajednice cenomanskih naslaga Jadranske karbonatne platforme; primjer Savudrija, Istra

undergraduate thesis

• Title (english): Microfossil assemblages of the Cenomanian deposits of the Adriatic Carbonate Platform; example Savudrija, Istria
• Author: Tonka Radas
• Mentor: Blanka Cvetko Tešović (mentor)
• Committee member: Blanka Cvetko Tešović (predsjednik povjerenstva)
• Committee member: Maja Martinuš (član povjerenstva)
• Committee member: Nenad Tomašić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2022-09-22, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Geology and Paleontology

Abstract

Gornjokredne naslage sjeverozapadne Istre pripadaju trećoj taložnoj megasekvenci (gornji alb–donji kampan) karbonatnih naslaga Istre kao dijela Jadranske karbonatne platforme. Na 14 prikupljenih uzoraka naslaga na lokalitetu Savudrije provedena je mikropaleontološka analiza. Analizom je određeno i opisano sveukupno 14 taksona bentičkih organizama (uglavnom bentičke foraminifere), prisutnih u pet mikrofacijesa. Pomoću značajnijih mikrofosilnih vrsta bentičkih foraminifera određena je starost istraživanih naslaga kao srednji do mlađi cenoman. Određena mikrofosilna zajednica te mikrofacijesi u kojima se pojavljuju korelirani su s neformalmom formacijom Milna određenom na otoku Braču. Utvrđeno je da su naslage taložene na unutarnjem dijelu karbonatne platforme gdje su se uvjeti mijenjali od stabilnijih potplimnih (subtajdalnih), do nestabilnijih plimnih (intertajdalnih).

Abstract (english)

The Upper Cretaceous deposits of northwestern Istria belong to the third sedimentary megasequence (upper Albian-lower Campanian) of carbonate deposits of Istria as part of the Adriatic carbonate platform. A micropaleontological analysis was carried out on 14 samples of deposits collected at the Savudrija locality. In the analysis a total of 14 taxa of benthic organisms (mainly foraminifera, present through five microfacies) were determined and described. Using the more significant microfossil species of benthic foraminifera, the age of the investigated deposits was determined as middle to upper Cenomanian. The determined microfossil community and the microfacies in which they appear are correlated with the informal Milna formation on the island of Brač. It was found that the deposits were deposited on the inner part of the carbonate platform where the conditions changed from more stable subtidal to more unstable tidal (intertidal).

• Keywords: Velike bentičke foraminifere; cenoman; karbonatne naslage; Jadranska karbonatna platforma; Savudrija; Istra
• Keywords (english): Large benthic foraminifera; Cenomanian; carbonate deposits; Adriatic Carbonate Platform; Savudrija; Istria
• Language: croatian
• URN:NBN: urn:nbn:hr:217:692439
• Project: Number: IP-2019-04-8054; Title: Zapadnoistarska antiklinala kao idealni prirodni laboratorij za proučavanje regionalnih diskordancija u karbonatnim stijenama; Acronym: WIANLab; Leader: Goran Durn; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: Undergraduate university study of Geology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) geologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) geologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2024-09-22
• Created on: 2022-10-05 10:52:02