A permeable rock layer that transmits water freely is referred to as an aquifer.
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Much of the water that flows in rivers is not direct runoff from rain or snowmelt, but originates as groundwater.
Most caverns are created at or near the water table.
Caves can only form in limestone.
Which acid is responsible for most karst topography?
A. Hydrochloric
B. Nitric
C. Sulfuric
D. Carbonic
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