Lithostratigraphic characteristics of Upper Albian carbonate breccia in dimension stone quarry Tvrda Ljut (Široki Brijeg) : master's thesis

Terenskim istraživanjem i mikropetrografskom analizom unutar karbonatnih breča iz ležišta arhitektonsko-građevnog kamena Tvrda Ljut (Široki Brijeg) definirano je pet različitih litofacijesa klasta: (a) foraminiferskog grejnstona (biosparita), (b) mikrita i djelomice (de)dolomitiziranog mikrita, (c) mikrita s ostrakodima/ostrakodnog mikrita (djelomice (de)dolomitiziranog) (d) rekristaliziranog/(de)dolomitiziranog pelsparita; te (e) dolomita-dedolomita. Na temelju determinacije mikrofacijesa klasta i ostalih karakteristika karbonatnih breča utvrđen je plitkomorski okoliš formiranja ležišta, uz djelovanje tektonike te vjerojatno padinskih ili gravitacijskih procesa. Analizom prisutnih fosilnih ostataka u klastima određena je gornjoalbska starost brečiranih naslaga.Abstract: Five different lithofacies of carbonate breccia clasts in dimension stone quarry Tvrda Ljut (Široki Brijeg) have been determined by field work and micropetrographic analysis: (a) foraminiferal grainstone (biosparite), (b) micrite and partially (de)dolomitized micrite, (c) micrite with ostracods/ostracodal micrite (partially (de)dolomitized), (d) recrystallized/(de)deolomitized pelsparite and (e) dolomite-dedolomite. Based on the determination of microfacies of clasts and other charachteristics of carbonate breccia it has been determined that the quarry was formed in the shallow-marine environment, with the activity of tectonics, as well as the slope and gravitational processes. By analysing fossil remains in clasts it has been determined that the brecciated deposits are of Upper Albian age