is basalt impermeable
An aquifer is a body of saturated rock or sediment through which water can move easily. Highly permeable and saturated with water. Good: sandstone, conglomerate, well jointed limestone, bodies of sand and gravel, volcanic rock such as columnar basalt. Shall usually impermeable.ost sandstones and conglomerates are both porous and permeable. An impermeable rock is the one that does not allow water to flow through easily-like unfractured granite and schist are impermeable. Shale is porous but low permeability(pores too small for water to pass through).