• Bristlecone Pine

    Great Basin

    National Park Nevada

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  • Road Work at Great Basin National Park

    The Scenic Drive is open with up to 15 min delays due to road work. Wheeler Peak Campground will be closed for the day on October 14th. Lower Lehman Campground will be closed for the day on October 15th. Click more for details. Updated 10/9/14 More »

  • Snake Creek Road and Campsites Closed

    The Snake Creek Road will be closed from the park boundary into the park to begin work on campsites, trails and restroom improvements. Work will continue until snow closes the project. Work will resume in Spring 2015.

Gypsum Formations

Gypsum desposits
Gypsum deposits seen off the tour route in Lehman Caves
NPS PHOTO
 
Gypsum Formations seen in the Gypsum Annex

Gypsum Formations were discovered in the Gypsum Annex of Lehman Caves.

NPS PHOTO

Gypsum: a rarity in Lehman Caves
Gypsum formations form in a similar way to calcite speleothems. Gypsum is a mineral, with the chemical formula CaSO4· 2H2O. Basically, it is calcium sulfate with some water attached. Gypsum can take forms known by cavers as snow, flowers, crust, needles, and hairs, depending on the shape. There are no gypsum formations along the tour route, but there are many in the Gypsum Annex. They tend to be white (or colorless), small, and very fragile.

Did You Know?

Century + year old orchard; Photographed by Bryan Petrytyl

The apricot trees in front of the Lehman Caves Visitor Center in Great Basin National Park are over 100 years old! The trees are thought to have been planted by Absalom Lehman, discoverer of Lehman Caves. These historic fruit trees continue to produce today.