Microphysiographic characteristics of Macelj-sandstones

U ovom radu analiziran je uzorak pješčenjaka poznat pod nazivom Maceljski pješčenjak. Radi se o pješčenjacima donjomiocenske starosti koji pripadaju formaciji Macelj. Uzorkovan je izdanak kod sela Donji Macelj u Hrvatskom zagorju. Analizom sadržaja karbonatne komponente utvrđeno je da pješčenjak ne sadrži karbonatne minerale. Analiza mikroskopskog izbruska pokazala je da se radi o srednje do dobro sortiranom gusto pakiranom srednjezrnatom pješčenjaku u čijem sastavu dominiraju kremen i litične čestice. Osim toga pješčenjak sadrži i brojne čestice glaukonita koje stijeni daju karakterističnu zelenu boju. Uzorak je određen kao litični arenit s glaukonitom.In this paper, a sandstone sample known as Macelj sandstone is analyzed. These sandstones are of Early Miocene age that belong to the Macelj Formation. Sampling was done near the village of Donji Macelj in Hrvatsko Zagorje. Analysis of the content of the carbonate component revealed that the sandstone does not contain carbonate minerals. Analysis of the thin-sections showed that it is a medium to well-sorted densely packed medium-grained sandstone composed of quartz and lytic particles. The sandstone contains also numerous glauconite particles that give the rock its characteristic green colour. The sample was determined as lytic arenite with glauconite