Anthracite lan Gritstone Definition
definisi
Anthracite jinis rock sedimentary kang hard lan macem-macem batu bara sing wis luster dhuwur
gritstone utawa grit punika hard, coarse-grained, siliceous sandstone
asal
pennsylvania, kita
pennines, england
panemu
Dingertèni
JJ Ferber
Etimologi
saka anthrakites greek, saka anthrax, anthrak meaning coal
saka grit + watu
kelas
rocks metamorphic
rocks sedimentary
sub-kelas
awet rock, rock alus
awet rock, hard rock
group
ora ditrapake
ora ditrapake
kategori liyane
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque
rock grained coarse, rock opaque