arkose punika rock sedimentary, khusus jinis sandstone ngemot paling sethithik 25% Feldspar 0
saka wilayah Auvergne saka prancis digunakake dening geologist Alexandre brongniart french 1826 sing Applied istilah iki kanggo sawetara sandstones feldspathic 0
rock grained coarse, rock opaque 0