definisi
Anthracite jinis rock sedimentary kang hard lan macem-macem batu bara sing wis luster dhuwur
trachyte punika rock vulkanik nggoleki-grained werna abu-abu kang utamané dumadi saka Feldspar alkali
asal
pennsylvania, kita
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panemu
Ora dingerteni
Alexandre brongniart Rene Hauy
Etimologi
saka anthrakites greek, saka anthrax, anthrak meaning coal
saka trakhus greek atos 'utawa roughness trakhutēs
kelas
rocks metamorphic
batuan beku
sub-kelas
awet rock, rock alus
awet rock, medium atose rock
kategori liyane
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque
rock grained nggoleki, rock opaque