comendite punika hard, peralkaline igneous rock, jinis cahya rhyolite werna abu-abu biru
hyaloclastite iku sawijining ongko saka nggoleki, lebu glassy kawangun dening kontak dadakan saka panas, magma manéka warna takson lan banyu kadhemen utawa endhepan banyu-kebak
medium rock grained, rock opaque
rock grained nggoleki, rock opaque