definisi
coal iku combustible-ireng coklat ireng utawa sedimentary rock biasane kedadean ing parang tingkat ing lapisan sing disebut kasur coal
trachyte punika rock vulkanik nggoleki-grained werna abu-abu kang utamané dumadi saka Feldspar alkali
Sajarah
asal
usa
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panemu
john peter Salley
Alexandre brongniart Rene Hauy
Etimologi
saka col term english lawas, kang wis temenan Mineral karbon fosil wiwit abad kaping 13
saka trakhus greek atos 'utawa roughness trakhutēs
kelas
rocks sedimentary
batuan beku
sub-kelas
awet rock, rock alus
awet rock, medium atose rock
kulawarga
group
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vulkanik
kategori liyane
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque
rock grained nggoleki, rock opaque