Obsidian lan Shoshonite Definition
definisi
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
  
shoshonite punika rock basaltic, mlaku a trachyandesite potassic, dumadi saka olivine, augite lan plagioclase phenocrysts ing groundmass karo plagioclase calcic lan sanidine lan sawetara kaca vulkanik peteng-colored
  
Sajarah
  
  
asal
Ethiopia
  
wyoming, usa
  
panemu
obsius
  
iddings
  
Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
  
saka panggonan asal disebut shoshone riverin wyoming
  
kelas
batuan beku
  
batuan beku
  
sub-kelas
awet rock, medium atose rock
  
awet rock, medium atose rock
  
kulawarga
  
  
group
vulkanik
  
vulkanik
  
kategori liyane
rock opaque
  
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque