Giles County, Virginia

  • Area: 357 square miles
  • Population: 16,657 (2000 census)
  • Persons/Sq. Mile: 46.7
  • % Karst Terrane: approx. 50%
  • Longest Cave: 118,272 feet
  • Average Length: 1287 feet
  • Deepest Cave: 718 feet
  • Number of Reported Caves: 253
  • Surveyed Cave Passage: 62 miles

Major Karst Development Areas:

  • Wilburn Valley
  • New River Karst Peneplain
  • Sinking Creek Valley

Karstic Formations and Map Symbols:

  • Undivided Ordovician - Ou
  • Greenbriar - Mg

Detailed Map - Click to View: