Geologists believe that the unique formation found in Wind Cave called boxwork, predates the cave. The cave is formed in limestone and geologists believe that

Source URL: www.nps.gov

• Black Hills
• Frostwork
• South Dakota
• Boxwork
• Wind Cave National Park
• Cave
• Limestone
• Abukuma-do
• Jewel Cave National Monument
• Speleothems
• Geology
• Physical geography