Pumice lan Batubara Definition

Pumice

Batubara

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1 Definition

1.1 definisi

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

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

1.2 Sajarah

1.2.1 asal

spain

usa

1.2.2 panemu

Dingertèni

john peter Salley

1.3 Etimologi

saka pomis french lawas, saka varian dialect latin saka pumex

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

1.4 kelas

batuan beku

rocks sedimentary

1.4.1 sub-kelas

awet rock, medium atose rock

awet rock, rock alus

1.5 kulawarga

1.5.1 group

vulkanik

ora ditrapake

1.6 kategori liyane

rock grained nggoleki, rock opaque

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

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