Nekaj mehkužcev iz eocenskega fliša Goriških brd / Selected molluscs from the Eocene flysch of Goriška brda, western Slovenia
Abstract
V prispevku je raziskovanih in predstavljenih le nekaj izbranih mehkužcev iz Goriških brd. Vsi so iz eocenskega fliša najdišč Vipolže in Dolnje Cerovo v zahodni Sloveniji, v neposredni bližini državne meje med Slovenijo in Italijo. Mehkužci so slabo ohranjeni, večinoma so fragmentirane in precej korodirane hišice in kamena jedra polžev, manj je školjk. Pri ostrigah so praviloma ohranjenene tudi lupine. Zaenkrat je ugotovljenih 24 različnih polžjih in sedem školjčnih oblik. Registrirane oblike mehkužcev kažejo na velike podobnosti z zahodneje ležečimi najdišči v severni Italiji, predvsem z Venetom in Furlanijo. Analizirali smo tudi vzorce na nanoplankton, ugotovljene oblike nam določajo spodnji lutetij oziroma mejno območje med bioconama NP14 in NP15.
Ključne besede : mehkužci, nanoplankton, eocen, fliš, Goriška brda, Slovenija
The article discusses and presents some selected mollusc fossils found in Goriška Brda. All were found in Eocene flysch in Vipolže and Dolnje Cerovo in western Slovenia, in immediate vicinity of the state border between Slovenia and Italy. The mollusc fossils are poorly preserved, the assemblage consists mostly of fragmented and severely corroded shells and cast fossils of gastropods and a few bivalves, some oysters shells are preserved as well. Until now 24 different species of gastropods were determined and seven forms of bivalves. The registered mollusc forms display strong similarity with sites in northern Italy, particularly those in Veneto and Friuli. We analysed some samples for nannoplankton and assigned them the boundary interval between biozones NP14/15 in the Lower Lutetian.
Key words : Molluscs, Nannoplankton, Eocene, flysch, Goriška brda, Slovenia
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