Paleoekološke značajke gornjocenomanskih naslaga s hondrodontama u području Savudrije, Istra

master's thesis

• Title (english): Paleoecology of Upper Cenomanian deposits with Chondrodontas, Savudrija area, Istria
• Author: Anita Kolić
• Mentor: Alan Moro (mentor)
• Mentor: Aleksandar Mezga (komentor)
• Committee member: Alan Moro (predsjednik povjerenstva)
• Committee member: Aleksandar Mezga (član povjerenstva)
• Committee member: Nenad Tomašić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2023-09-15, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology

Abstract

Na području Savudrije, Istra, provedena je mikrofacijesna analiza krednih uzoraka jednoga profila i analizom mikroskopskih preparata određeno je pet mikrofacijesa, a okoliš taloženja u kojem su živjele hondrodonte i radiolitidi određen je kao podplimsko-plimski okoliš zaštićene platforme. Starost istraživanih naslaga određena je temeljem mikrofosilne zajednice u kojoj su određene provodne vrste Chrysalidina gradata d'ORBIGNY i Broeckina (Pastrikella) balcanica CHERCHI, RADOIČIĆ & SCHROEDER čiji je biostratografski raspon srednji-gornji cenoman. Uz ostale paleoekološke uvjete koji su mogli više pogodovati hondrodontama, prekrivanje površine sedimenta velikim plosnatim ljušturama te relativno povišena brzina sedimentacije koja je više pogodovala hondrodontama omogućili su da hondrodonte bioprodukcijski nadmaše radiolitide.

Abstract (english)

In the area of Savudrija, Istria, a microfacies analysis of Upper Cretaceous samples was carried out. Five microfacies were determined by the analysis of thin sections as which indicate that the paleoenvironment in which chondrodontas and radiolitids thrived was a peritidaltidal environment of a protected part of the platform. The age of the investigated deposits was determined on basis of the microfossil community in which the species Chrysalidina gradata d'ORBIGNY and Broeckina (Pastrikella) balcanica CHERCHI, RADOIČIĆ & SCHROEDER determined biostratigraphic range of investigated limestones Middle-Upper Cenomanian. Beside other paleoecological conditions, which could be in favor for chondrodontas, covering of the sediment surface with large elongated and flat shells as well as possible relatively higher sedimentation rate could give possibility to chondrodontas to outpace radiolitids in bioproduction.

• Keywords: Savudrija; cenoman; zaštićena karbonatna platforma; bentičke foraminifere; hondrodonte; radiolitidi
• Keywords (english): Savudrija; Cenomanian; protected carbonate platform; benthic foraminifera; hcondrodontas; radiolites
• Language: croatian
• URN:NBN: urn:nbn:hr:217:215253
• Study programme: Title: Environmental Geology; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni magistar/magistra geologije (sveučilišni magistar/magistra geologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2025-09-16
• Created on: 2025-01-31 08:47:11