• Area: 177 square miles
• Population: 12,652 (2000 census)
• Persons/Sq. Mile: 71.5
• % Karst Terrane: approx. 30%
• Number of Reported Caves: 5
• Surveyed Cave Passage: <1 mile
• Longest Cave: 125 feet
• Average Length: 40 feet
• Deepest Cave: 10 feet

Major Karst Development Areas:

• Shenandoah Valley
• ??? Valley
• ??? Ridge

Karstic Formations and Map Symbols:

• Helderberg - DSu
• Ordovician - Ou

Detailed Map - Click to View:

• Clarke County Map Clarke County Map
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