Question

Which layers are impermeable ?

layer of loose soil

layer of sand

layer of gravel

layer of hard clay

solid rock

Answer 1

solid rock

Step-by-step explanation:

Permeability is the ability of fluids to flow through rock. It depends on the connectivity of the pore space. Permeable rocks include sandstone and fractured igneous and metamorphic rocks and karst limestone. Impermeable rocks include shales and unfractured igneous and metamorphic rocks.