Which of the following materials has high porosity and high permeability?

A) unfractured granite
B) well-sorted gravel
C) compacted clay
D) uncompacted clay
E) poorly sorted sand, silt, and clay

Permeability

The ability of a material, especially soil or rock, to allow fluids to pass through it via an interconnected network of pores.

Porosity

A measure of how much of a rock is open space, which can hold fluids such as water, oil, or gas.

Uncompacted Clay

Clay in its natural, undisturbed state, not subjected to pressure, and therefore retaining its original volume and porosity.