jinis
Phyllite, Schist, lan Slate
nepheline-basanite, analcite-basanite lan leucite-basanite
fitur
gampang pecah dadi lancip piring, lumahan asring mengilap, rock grained banget nggoleki
clasts Gamelan kanggo tutul, gampang pecah dadi lancip piring, tahan struktural dhuwur marang erosi lan iklim, digunakake minangka Touchstone a