definisi
Anthracite jinis rock sedimentary kang hard lan macem-macem batu bara sing wis luster dhuwur
kenyte iku macem-macem phonolite porphyritic utawa trachyte rock karo phenocrysts rhomb shaped anorthoclase karo rupo olivine lan augite ing matrik glassy
Sajarah
asal
pennsylvania, kita
gunung kenya
panemu
Ora dingerteni
JW Gregory
Etimologi
saka anthrakites greek, saka anthrax, anthrak meaning coal
saka gunung ranges- Gunung kenya lan dijenengi dening JW Gregory in 1900
kelas
rocks metamorphic
batuan beku
sub-kelas
awet rock, rock alus
awet rock, medium atose rock
kulawarga
group
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kategori liyane
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque
rock grained nggoleki, rock opaque