Deadly Crystal Cave | National Geographic

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Geology Page

June 11, 2016

Cave of the Crystals or Giant Crystal Cave is a cave connected to the Naica Mine 300 metres (980 ft) below the surface in Naica, Chihuahua, Mexico.

One of the world’s most spectacular geographical discoveries was the cave of giant crystals with its selenite crystals of a size never seen before. most of them measure six meters in length, with some of them reaching eleven meters. the temperature at this depth varies from 45°C to 50°C, while the percentage of humidity ranges from 90 to 100%, meaning that human beings cannot survive there for longer than two hours.

More Info: http://www.geologypage.com/2016/06/ca…

https://www.youtube.com/watch?v=ZsIebVCr0zk

One comment

  1. I don’t think it’s two hours. The scales meet at minus 40 C and minus 40 F. At minus 40 you can’t stay out walking more than around 10 to 20 minutes. Runners may be able to stay out longer. At around minus 50 C it the water in your nose freezes and it’s risky to do more than cross the street from one building to another. Montreal shuts down at this temp. What I’m saying assumes that you are very well dressed, too – turtle neck, wool or fleece sweater, very warm coat (e.g down), thermal or wool socks (maybe two pair), two pairs of gloves, etc. Even then at minus 30 to 40 with two pairs of socks and two pairs of gloves you risk frost bite in around 15 minutes. Your hands and toes will need to be defrosted in first cold and then warm water. This is based on my experience walking in these temps. It’s best to be able to run. I went to a party once and someone stole my scarf and no public transit I had to literally run home.

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