CHARACTERISTICS OF SELECTED DISCONTINUITY SURFACES RECORDED WITHIN THE ADRIATIC-DINARIDIC CARBONATE PLATFORM DEPOSITS

Brlek, Mihovil (2014) CHARACTERISTICS OF SELECTED DISCONTINUITY SURFACES RECORDED WITHIN THE ADRIATIC-DINARIDIC CARBONATE PLATFORM DEPOSITS. Doctoral thesis, Faculty of Science > Department of Geology.

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Abstract

Discontinuity surfaces resulting from breaks in sedimentation and representing hiatuses independent of their duration are key horizons in the sedimentary record. Various types of discontinuity surfaces are included under this non-interpretative term, including marine firmgrounds and hardgrounds, subaerial exposure surfaces, as well as composite (or polygenic) surfaces. Discontinuity surfaces are useful marker horizons for correlation of stratigraphic sections and are highly applicable in carbonate sequence stratigraphy. The significance of substrate-controlled trace fossil suites and calcretes, as well as authigenic marine mineralization, for genetic interpretations of discontinuity surfaces has been emphasized by many researchers. Stable isotopic signatures of pedogenic carbonates (calcretes) also represent a very valuable indicator of meteoric diagenesis, and are commonly used for paleoenvironmental reconstructions in Quaternary deposits. There are only a few records of detailed ichnological, sedimentological, pedo(dia)genetic, mineralogical and isotopic analyses of discontinuity surfaces present in the Mesozoic to Cenozoic carbonate successions of the External Dinarides, which also emphasizes the need for continuing investigation of such surfaces. Several types of discontinuity surfaces, including subaerial exposure, marine omission and composite surfaces, characterized by well-developed and indicative ichnological, sedimentological, pedo(dia)genetic, mineralogical, and isotopic signatures, were recorded within Upper Cretaceous to Paleocene carbonate deposits in central Dalmatia (southern part of the Adriatic-Dinaridic Carbonate Platform, ADCP) and Lower Jurassic deposits in southwestern Slovenia.

Item Type: Thesis (Doctoral thesis)
Keywords: discontinuity surfaces, regional Cretaceous to Paleogene subaerial unconformity, biogenic calcretes, Microcodium aggregates, Thalassinoides, Glossifungites ichnofacies, glaucony, δ13C, pedo(dia)genesis, Adriatic-Dinaridic Carbonate Platform
Supervisor: Korbar, Tvrtko
Co-supervisor: Cvetko Tešović, Blanka
Date: 2014
Number of Pages: 122
Subjects: NATURAL SCIENCES > Geology
Divisions: Faculty of Science > Department of Geology
Depositing User: Danica Vujičić
Date Deposited: 13 May 2015 19:59
Last Modified: 13 May 2015 19:59
URI: http://digre.pmf.unizg.hr/id/eprint/2782

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