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

Valley and Ridge aquifers

(figures 75-87)

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Introduction (Click to view thumbnails and download figures)

• Figure 75 Map of Valley and Ridge aquifers
• Figure 76 Photo of the Valley and Ridge Province
• Figure 77 Physiographic province map
• Figure 78 Photo of a water gap along the Delaware River
• Figure 79 Photo of a wind gap through Blue Mountain

Geologic structure

Hydrogeologic units (Click to view thumbnails and download figures)

• Figure 80 Correlation chart

Ground-water flow (Click to view thumbnails and download figures)

• Figure 81 Hydrogeologic section
• Figure 82 Hydrogeologic section
• Figure 83 Map of cave passages from Crystal Grottoes in Washington County, Md.
• Figure 84 Hydrogeologic section
• Figure 85 Hydrogeologic section

Relation of geology and well yield

Ground-water quality (Click to view thumbnails and download figures)

• Figure 86 Charts showing chemical composition

Fresh ground-water withdrawals (Click to view thumbnails and download figures)

• Figure 87 Chart showing use of fresh ground-water withdrawals during 1985

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