Batubara lan Pumice Definition

Batubara

Pumice

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1 Definition

1.1 definisi

coal iku combustible-ireng coklat ireng utawa sedimentary rock biasane kedadean ing parang tingkat ing lapisan sing disebut kasur coal

pumice punika rock vulkanik sing kasusun saka Highly vesicular atos kaca vulkanik tekstur, kang bisa utawa ora bisa ngemot kristal

1.2 Sajarah

1.2.1 asal

usa

spain

1.2.2 panemu

john peter Salley

Dingertèni

1.3 Etimologi

saka col term english lawas, kang wis temenan Mineral karbon fosil wiwit abad kaping 13

saka pomis french lawas, saka varian dialect latin saka pumex

1.4 kelas

rocks sedimentary

batuan beku

1.4.1 sub-kelas

awet rock, rock alus

awet rock, medium atose rock

1.5 kulawarga

1.5.1 group

ora ditrapake

vulkanik

1.6 kategori liyane

rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque

rock grained nggoleki, rock opaque

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