1 Definition
1.1 definisi
Anthracite jinis rock sedimentary kang hard lan macem-macem batu bara sing wis luster dhuwur
websterite punika ultramafic lan ultrabasic rock sing kasusun saka takeran kira-kira witjaksono orthopyroxene lan clinopyroxene. iku jinis khusus saka pyroxenite.
1.2 Sajarah
1.2.1 asal
pennsylvania, kita
webster, North Carolina
1.2.2 panemu
1.3 Etimologi
saka anthrakites greek, saka anthrax, anthrak meaning coal
saka kutha webster dumunung ing North Carolina
1.4 kelas
rocks metamorphic
batuan beku
1.4.1 sub-kelas
awet rock, rock alus
awet rock, hard rock
1.5 kulawarga
1.5.1 group
1.6 kategori liyane
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque
rock grained coarse, rock opaque