Neatorama Posts Tagged "gypsum"
The Largest Underwater Gypsum Cave on Earth

Russia’s Orda Cave is the Largest Underwater...  ...Russia’s Orda Cave is the Largest Underwater Gypsum Cave on Earth. It's not easy to get to, but the p...

http://www.neatorama.com/2012/07/13/the-largest-underwater-gypsum-cave-on-earth/
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