Shoshonite lan Shoshonite Definition

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   

  

wyoming, usa   

iddings   

saka panggonan asal disebut shoshone riverin wyoming   

batuan beku   

awet rock, medium atose rock   

  

vulkanik   

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