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Pumice
Pumice

Obsidian
Obsidian



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Obsidian

Pumice lan Obsidian Definition

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Definition

definisi

pumice punika rock vulkanik sing kasusun saka Highly vesicular atos kaca vulkanik tekstur, kang bisa utawa ora bisa ngemot kristal
obsidian punika kaca vulkanik alami kawangun minangka rock igneous extrusive. diprodhuksi nalika lahar felsic extruded saka gunung mbledhos ndingin kanthi cepet karo wutah kristal minimal

Sajarah

asal

spain
Ethiopia

panemu

Ora dingerteni
obsius

Etimologi

saka pomis french lawas, saka varian dialect latin saka pumex
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius

kelas

batuan beku
batuan beku

sub-kelas

awet rock, medium atose rock
awet rock, medium atose rock

kulawarga

group

vulkanik
vulkanik

kategori liyane

rock grained nggoleki, rock opaque
rock opaque