Identify the term for a porous rock layer that stores groundwater.

Identify the term for a porous rock layer that stores groundwater.

• A. Aquifer
• B. Reservoir
• C. Aquiclude
• D. Groundwater pocket

Answer: (A)

The key idea is the layer that holds and can release groundwater. An aquifer is a porous, permeable rock layer that stores groundwater and allows it to move so it can be tapped by wells. The porosity provides the storage space while permeability lets water flow through it. Aquifers can be unconfined, with water in contact with the surface, or confined, trapped between impermeable layers. In contrast, an aquiclude is an impermeable layer that stops water movement, so it doesn’t store usable groundwater. A reservoir is a general term that can refer to any large storage of water, not specifically a porous rock layer. Groundwater pocket isn’t a standard term in geology.

The key idea is the layer that holds and can release groundwater. An aquifer is a porous, permeable rock layer that stores groundwater and allows it to move so it can be tapped by wells. The porosity provides the storage space while permeability lets water flow through it. Aquifers can be unconfined, with water in contact with the surface, or confined, trapped between impermeable layers. In contrast, an aquiclude is an impermeable layer that stops water movement, so it doesn’t store usable groundwater. A reservoir is a general term that can refer to any large storage of water, not specifically a porous rock layer. Groundwater pocket isn’t a standard term in geology.