sapropelic groundmass腐泥基質
gelified groundmass凝膠化基質
relatively stable groundmass相對穩定地塊
felty groundmass氈狀基質
felted groundmass氈狀基質
sapropel groundmass腐泥基質
groundmass material基體材料
shearing groundmass剪切基質
fusinized groundmass絲炭化基質
1. the matrix of fine-grained crystalline material in which larger crystals are embedded