adapted from USGS Water
Resources Investigations 77-65, by M. D. Winner, Jr., figure 2.
vertical exaggeration and cross-section is generalized |
Mountains and Piedmont Region Topics
In the Piedmont and Mountain regions of North Carolina, two major aquifer systems exist, and usually interact with one another.
The surficial materials or regolith of these provinces forms the unconfined surficial aquifer and the fractured rock beneath is the
unconfined to semi-confined bedrock aquifer. Regolith consists of soils and saprolite (weathered bedrock) and alluvium
(transported weathered bedrock). Usually the surficial aquifer feeds the fractures in the bedrock aquifer.
The diagram to the left shows the possible range in fluctuation of the water table during a drought
(the dashed line) which would lead to drying out of the creek.
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