Speleothems - Dogtooth Spar
Spear-shaped crystals of calcite called dogtooth spar frequently line small pockets in the limestone rock. These crystals are a prominent feature of other caves in the Black Hills, most notably, Jewel Cave of Jewel Cave National Monument.
Did You Know?
The American bison is the largest terrestrial mammal in North America. Male bison can weigh a ton and can run 35 miles per hour. Do not approach bison. They weigh more and can outrun you. More...