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January 18, 2018, 03:00:35 PM

Author Topic: USA, South Dakota, Custer, Jewel Cave National Monument  (Read 18 times)

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Frank de Wit

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USA, South Dakota, Custer, Jewel Cave National Monument
« Reply #1 on: August 11, 2016, 08:33:16 PM »
Jewel Cave National Monument
https://www.nps.gov/jeca/index.htm
(http://www.mindat.org/loc-45285.html)

Jewel Cave
With calcite and hydromagnesite "balloons"

11149 U.S. Hwy. 16, Custer, Black Hills, 57730 South Dakota, USA

Also see:
https://en.wikipedia.org/wiki/Jewel_Cave_National_Monument
https://www.facebook.com/JewelCaveNPS