Coastal Plain Region

Coastal Plain Region

block diagram of the coastal plain aquifer system
extreme vertical exaggeration and cross-section is generalized
Coastal Plain Region Topics

In the coastal plain, as shown dissected to the left, an aquifer is typically composed of one to several layers of eastward thickening, permeable sands or limestone (the stippled yellow pattern) split by discontinuous, clay-rich materials. Confining units, consisting of clay-rich sediments, exist above and below an aquifer (the gray pattern). These confining units are more continuous clay layers and separate the aquifers. The surficial or unconfined aquifer overlies all the confined aquifers in the coastal plain. Igneous and metamorphic bedrock drops off dramatically toward the east and is shown at the base of the sedimentary materials.