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