• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Speleothems - Gypsum Features

Gypsum Needles near the Muddle Room
Gypsum Needles near the Muddle Room
NPS Photo by Larry Toole
 
Gypsum crystals are common in some of the dryer parts of the cave. Gypsum, a mineral containing both calcium and sulfur, sometimes takes the form of needle-like crystals that radiate from clusters on the floor of the cave; in other cases, gypsum resembles puffs of cotton, or forms clusters of curved or coiled crystals called gypsum flowers.
 

More Speleothems:
Boxwork | Calcite Rafts | Cave Popcorn |
Dogtooth Spar | Flowstone/Dripstone |
Frostwork | Helictite Bushes

Click here to see a program about the formations of Wind Cave

Did You Know?

fire on the prairie

Fire is an important factor in protecting the prairie. Historically, fires burned across the prairie every 4 to 7 years. Fires burn the small trees that would otherwise march across the prairie and turn the grasslands to forest.