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Spodnjekredna amonitna združba iz Leš pri Prevaljah
ID Bricman, Andrej (Author), ID Gale, Luka (Mentor) More about this mentor... This link opens in a new window, ID Križnar, Matija (Co-mentor)

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Abstract
V Sloveniji je bilo sedaj iz časa mezozoika najdenih kar nekaj fosilov amonitov, predvsem iz časa triasa in jure. V zadnjih desetih letih je bil južno od Leš pri Prevaljah odkrit izdanek plastnatega apnenca, v katerem je bila najdena bogata fosilna združba, še posebej izstopajo primerki amonitov. Po pregledu dr. Ivana Ocepka in Matije Križnarja iz Prirodoslovnega muzeja Slovenije so bili tukaj najdeni tudi prvi heteromorfni amoniti na območju današnje Slovenije. Namen moje raziskovalne naloge je bil pregled do sedaj najdenih primerkov amonitov iz tega območja, ki so v lasti dr. Ivana Ocepka, jih taksonomsko opredeliti ter poizkušati interpretirati okolje ter čas, v katerem so ti živeli. Za potrebe raziskovalne naloge so bili posneti trije profili v skupni dolžini 6,9 m, izdelanih pa je bilo 13 zbruskov za pregled kamnine pod optičnim mikroskopom. V svoji nalogi sem pregledal 46 primerkov ter uspel določiti 6 vrst ter 7 rodov amonitov. Enajst primerkov amonitov je zaradi slabše ohranjenosti ostala nedoločena. Določil sem, da se je kamnina odlagala v globokomorskem, pelagičnem okolju, določene vrste pa so nakazovale na sedimentacijo v času zgodnje krede. Zaenkrat je to najdišče v Sloveniji edinstveno, saj so tukaj prvič najdeni heteromorfni kredni amoniti na območju Slovenije.

Language:Slovenian
Keywords:Karavanke, amoniti, spodnja kreda, biancone apnenec, taksonomija, paleoekologija
Work type:Final paper
Organization:NTF - Faculty of Natural Sciences and Engineering
Year:2019
PID:20.500.12556/RUL-111009 This link opens in a new window
Publication date in RUL:22.09.2019
Views:2151
Downloads:320
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Secondary language

Language:English
Title:Lower Cretaceous ammonites from Leše near Prevalje
Abstract:
Several species of Triassic and Jurassic ammonites have been found in Slovenia up to the present. Layered limestone south of Leše near Prevalje yielded a rich group of fossils, primarily consisted of ammonites. Ivan Ocepek and Matija Križnar from the Slovenian Museum of Natural History examinated the samples and determined that the found heteromorphic ammonites are first of its kind in Slovenia. The purpose of my research paper was to review and taxonomically define the ammonites found on site, which are the property of Ivan Ocepek and to try to interpret the environment and time in which they lived. For the purpose of this research paper, three stratigraphic profiles have been studied and thirteen thin sections for optical microscopy have been made. In this assignment I have reviewed forty-six samples, of which I determined six species and seven genera, eleven samples remained undetermined, because of bad condition or my inexperience in this field. Finally I interpreted that the limestone deposited in a deep sea, pelagic environment during the Early Cretaceous.

Keywords:Karavanke Mts., ammonites, Early Cretaceous, Biancone limestone, taxonomy, paleoecology

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