definisi
Anthracite jinis rock sedimentary kang hard lan macem-macem batu bara sing wis luster dhuwur
troctolite jinis rock intrusive mafic. iku kasusun ateges Jumlah utama nanging maneko rupo olivine lan calcic plagioclase bebarengan karo pyroxene suntingan. iku anorthosite-sugih olivine, utawa sing relatif pyroxene-kurang saka gabbro
asal
pennsylvania, kita
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panemu
Ora dingerteni
christian Leopold von Buch
Etimologi
saka anthrakites greek, saka anthrax, anthrak meaning coal
saka troklotit german, saka trōktēs greek, iwak segara (dijupuk dadi sejenis iwak)
kelas
rocks metamorphic
batuan beku
sub-kelas
awet rock, rock alus
awet rock, hard rock
kategori liyane
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque
rock grained coarse, rock opaque