Microphysiographic characteristics of Lower Miocene sandstones in the vicinity of Gornja Voča

U ovom radu analiziran je uzorak donjomiocenskog pješčenjaka s izdanka na lokalitetu Gornja Voća smještenom u sjeverozapadnoj Hrvatskoj. Na uzorku su načinjene analiza mikroskopskog izbruska i analiza sadržaja karbonatne komponente. Dobiveni rezultati pokazuju da se radi o pješčenjaku tipa litični arenit koji sadrži 70% karbonatne komponente. Pješčenjak je slabo sortiran i sastavljen od slabo zaobljenih čestica. U modalnom sastavu prevladavaju litične čestice tipa kvarcita, rožnjaka, kvarc-sericitnog škriljavca, vapnenaca i kvarca, a utvrđeni su i fosilni ostaci crvenih algi, bodljikaša i foraminifera. Klastični detritus najvećim dijelom porijeklom je iz starijih metamorfnih i sedimentnih stijena, relativno kratko je transportiran i najvjerojatnije istaložen u marinskom okolišu povišene energije.In this paper, a sample of Lower Miocene sandstone from a shoot at the Gornja Voća site located in northwestern Croatia was analyzed. Analysis of the microscopic slide and analysis of the carbonate component content were performed on the sample. The obtained results show that it is a sandstone of the lytic arenite type containing 70% of the carbonate component. Sandstone is poorly sorted and composed of poorly rounded particles. The modal composition is dominated by lytic particles such as quartzite, chert, quartz-sericite shale, limestone and quartz, and fossil remains of red algae, echinoderms and foraminifera have been identified. Clastic detritus is mostly native to older metamorphic and sedimentary rocks, is relatively short transported, and is most likely deposited in a high-energy marine environment