GROUND WATER ATLAS of the UNITED STATES
Delaware, Maryland, New Jersey, North Carolina, Pennsylvania, Virginia, West Virginia
HA 730-L

Piedmont and Blue Ridge aquifers


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Relation of hydrogeologic setting and well yield



Figure 70 Diagramatic section showing ground-water movement (17K)
editable eps file L070.eps.gz (33K compressed)


Figure 71 Diagramatic section showing fracture influence on crystalline rock porosity (33K)
editable eps file L071.eps.gz (50K compressed)

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