What is the lower region of groundwater where all the pores in a rock or sediment are filled with water?

1 Answer
Sep 27, 2017

It is called an aquifer.


An aquifer is an underground layer of water-holding permeable rock (gravel, sand, or silt). This source of water is usually recharged by rainwater which percolates on the ground surface and seeps into the aquifer.

Usually, wells may be drilled into aquifers, but an excessive removal of the water can cause the ground to sink downward. This happened in Mexico City.