Ostanki sarmatijskih sesalcev iz profila Bela Cerkev / Sarmatian mammal remains of geological profile Bela Cerkev, Slovenia
Abstract
The article deals with remains of Sarmatian mammals found in diatomaceous marlstones and siltstones of a section at Bela Cerkev in Dolenjska, Slovenia. The section was uncovered in 2002 and 2003 in the northwestern border of Krka basin. The sequence of beds in the section is 25 m thick, and can be subdivided to five successive members differing in lithology, faunal contents and environment of deposition. In the base occurs the Badenian marly-carbonate marine member which is followed upwards by four Lower Sarmatian members. The first of the latter is the oncolitic-stromatolitic freshwater member which is followed by the dark grey to black marine-brackish mudstone member, then the marine-brackish yellowish-brown cerithian sandy member that passes into the about 15 m thick brachyhaline diatomaceous member. In the laminated diatomaceous siltstone of the last member was found the majority of bone remains belonging to dolphins of the family Acrodelphidae. Certain finds from the Bela Cerkev section are highly comparable with the dolphin bones found in Sarmatian beds of the Vienna basin.
Key words: Mammals, Cetacea, Early Sarmatian, Central Paratethys, profile Bela Cerkev, Krka basin, Slovenia
V prispevku so obravnavani ostanki sarmatijskih sesalcev, ki so najdeni v diatomejskih laporovcih in meljevcih profila Bela Cerkev na Dolenjskem. Profil je bil razkrit leta 2002 in 2003 na severnozahodnem obrobju Krške kotline. Kamnine imenovanega profila so debele 25 m, ki jih v poenostavljenem smislu lahko razdelimo na pet zaporednih litološko, favnistično in okoljsko različnih členov. Spodaj je badenijski lapornato-karbonatni morski člen, nad njim so štirje spodnjesarmatijski členi. Prvi je onkolitno-stromatolitni sladkovodni člen, sledi temnosiv do črn morsko-brakičen muljasti člen, nato morsko-brakičen rumenkastorjav ceritijski peščeni člen, ki prehaja v okrog 15 m debel brahihalini diatomejski člen. V laminiranem diatomejskem meljevcu slednjega člena je najdena večina kostnih ostankov, ki pripadajo delfinom iz družine Acrodelphidae. Določene najdbe iz profila Bela Cerkev so zelo primerljive s kostmi delfinov, ki so bile najdene v sarmatijskih skladih Dunajske kotline.
Ključne besede: sesalci, Cetacea, spodnji sarmatij, Centralna Paratetida, profil Bela Cerkev, Krška kotlina, Slovenija
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