Batubara lan Gritstone Definition
definisi
coal iku combustible-ireng coklat ireng utawa sedimentary rock biasane kedadean ing parang tingkat ing lapisan sing disebut kasur coal
gritstone utawa grit punika hard, coarse-grained, siliceous sandstone
asal
usa
pennines, england
panemu
john peter Salley
JJ Ferber
Etimologi
saka col term english lawas, kang wis temenan Mineral karbon fosil wiwit abad kaping 13
saka grit + watu
kelas
rocks sedimentary
rocks sedimentary
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