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
Quartzite punika rock non-foliated metamorphic sing formulir dening metamorphism saka sandstone quartz murni
rock grained nggoleki, rock opaque
medium rock grained, rock opaque