Gypsum caves, while rare, are not unheard of, even in the United States. For example, South Dakota's dazzling Jewel Cave National Monument is rich in gypsum crystals. But Alabaster Caverns stands ...

Then there is Gypsum Cave, an important ceremonial site for Southern Paiute people that also contained some of the earliest evidence of human inhabitants and Ice Age “megafauna,” or large ...

This cave had clearly built itself from the bottom up, rather than the top down. The ancient chemical soup had deposited not only deep beds of gypsum but also sulfur, manganese, iron, and other ...