其余硅质岩、碧玉岩、细碧岩、凝灰质砂岩为高阻低极化，视极化率一般在1%~3%。
The other rocks , such as silicalite , jaspilite , spilite , tuffaceous sandstone , show high resistivity and low chargeability ( 1 % ~ 3 % ) in nature .
碧玉岩