1 Definition
1.1 definisi
porphyry punika reddish-coklat kanggo kain rock igneous ngemot phenocrysts akeh macem-macem mineral ditempelake ing matrik nggoleki-grained
trachyte punika rock vulkanik nggoleki-grained werna abu-abu kang utamané dumadi saka Feldspar alkali
1.2 Sajarah
1.2.1 asal
1.2.2 panemu
Dingertèni
Alexandre brongniart Rene Hauy
1.3 Etimologi
saka lawas porfire french, saka porfiro italian lan ing sawetara kasus langsung saka porphyrites latin
saka trakhus greek atos 'utawa roughness trakhutēs
1.4 kelas
1.4.1 sub-kelas
awet rock, hard rock
awet rock, medium atose rock
1.5 kulawarga
1.5.1 group
1.6 kategori liyane
rock grained nggoleki, rock opaque
rock grained nggoleki, rock opaque