1 Definition
1.1 definisi
trachyte punika rock vulkanik nggoleki-grained werna abu-abu kang utamané dumadi saka Feldspar alkali
rhyolite punika rock igneous nggoleki-grained kang sugih ing silika
1.2 Sajarah
1.2.1 asal
1.2.2 panemu
Alexandre brongniart Rene Hauy
Ferdinand von Richthofen
1.3 Etimologi
saka trakhus greek atos 'utawa roughness trakhutēs
saka rhyolit german, saka stream lahar greek rhuax + watu lithos
1.4 kelas
1.4.1 sub-kelas
awet rock, medium atose rock
awet rock, hard rock
1.5 kulawarga
1.5.1 group
1.6 kategori liyane
rock grained nggoleki, rock opaque
rock grained coarse, rock opaque