GEOLOGY

Detailed explanation-1: -Sandstone is an example of porous rocks. The rocks which have connected pores and allow water to pass between them. This type of rocks are called permeable rocks or pervious rocks.

Detailed explanation-2: -Permeability is a measure of how interconnected the individual pore spaces are in a rock or sediment. A sandstone is typically porous and permeable.

Detailed explanation-3: -Clay is the most porous sediment but is the least permeable. Clay usually acts as an aquitard, impeding the flow of water. Gravel and sand are both porous and permeable, making them good aquifer materials. Gravel has the highest permeability.

Detailed explanation-4: -Primary permeability is dependent upon the manner of formation. Sandstones generally have greater primary permeability than limestone unless the latter is a reef, or similar, structure. Clastic sedimentary rocks tend to be more porous because of the uniqueness of their origin.

Detailed explanation-5: -Some rocks, such as sandstone or chalk, let water soak through them. They are called permeable rocks. Other rocks, such as slate, do not let water soak through them.