hornfels punika rock metamorphic kawangun dening kontak antarane mudstone utawa sugih lempung rock, lan awak igneous panas, lan nggantosi padha panas ngrubah saka rock asli
gritstone utawa grit punika hard, coarse-grained, siliceous sandstone
rock grained nggoleki, rock opaque
rock grained coarse, rock opaque