Discussion
A permeable rock formation that stores and transmits groundwater is called
Answer: B
Correct answer: An aquifer
An aquifer is a body of rock or sediment porous enough to hold water and permeable enough to let it flow - sandstone, limestone and unconsolidated gravel are typical. Groundwater held this way supplies a large share of the world’s drinking water and most of its irrigation. The two properties are distinct and both are needed: clay is highly porous but its pores are so fine that water will not move through it, which makes clay an aquiclude, a barrier rather than a store. A watershed is the divide between two drainage basins, a surface feature rather than a subsurface one. An artesian well is not a formation at all but a well drilled into a confined aquifer where the pressure is sufficient to drive water to the surface without pumping.
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