How old are the Crystal Caves?

Crystal Cave is a multi-level solutional cave formed in dolomite bedrock in the Prairie du Chien Group. The dolomite was formed 485 million years ago during the Lower Ordovician Period when a warm shallow ocean covered much of Minnesota and Wisconsin. It is Wisconsin's longest known cave.



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At this time there were two levels of the cave that had been discovered. Four thousand people attended the grand opening of newly named Crystal Cave on June 7, 1942 (DiIoia, 2004). The cave was renamed after the quartz crystals found in the cave itself and was a much flasher name then Sander's Corner Cave.

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NAICA CAVE OF CRYSTALS Mexico - DEADLY GIANT Selenite Crystals Cave. There is a place on Earth with such high temperature and humidity conditions that if you stay there for more than about 20 minutes, you could drown in the vapors of your own breath.

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Veryovkina Cave (also spelled Verëvkina Cave, Abkhaz: ????????? ?????, Georgian: ??????????? ??????, romanized: veriovk'inis mghvime) is a cave in Abkhazia, an occupied region of Georgia. At 2,223 meters (7,257 ft) deep, it is the deepest-known cave on Earth.

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Cave temperature is a constant 48 degrees, so a jacket or sweater is recommended.

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