Giant gypsum crystals

It is an amazing world!

Here’s the cover of the April 2007 issue of Geology, published by the Geological Society of America. These crystals of gypsum were discovered in a cave at a lead-silver-zinc mine 100 km from Chihuahua, Mexico. The crystals are up to 11 meters (36 feet) long, and were submerged in water beneath the water table before pumping of water occured as the mining went to greater depths.

A description of the image can be found here, and the technical abstract can be found here.
Grace and Peace

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