GEOLOGY

Detailed explanation-1: -A layer of rock that is sufficiently porous to store water, and permeable enough to allow water to flow through it, is called an aquifer. Consolidated porous and permeable rocks, for example, sandstone and limestone, can form important and extensive aquifers (e.g. Figure 15).

Detailed explanation-2: -Rocks that make up good aquifers not only have pores, but pores that are interconnected. These connections allow the groundwater to flow through the rock. Sandstone: Fine-grained rocks such as sandstone make good aquifers.

Detailed explanation-3: -Gravel and sand are both porous and permeable, making them good aquifer materials. Gravel has the highest permeability.

Detailed explanation-4: -An aquifer is a body of porous rock or sediment saturated with groundwater. Groundwater enters an aquifer as precipitation seeps through the soil. It can move through the aquifer and resurface through springs and wells.

Detailed explanation-5: -An aquifer is an underground layer of water-bearing, permeable rock, rock fractures, or unconsolidated materials (gravel, sand, or silt).