Just catching up with the first of 4 programmes in Iain Stewart's HOW EARTH MADE US.Extreme environments: it starts underground, with a look at an incredible geological location.
The session with the CRYSTAL CAVE of the NAICA mine in Chihuahua, Mexico.
The crystals are made from the mineral gypsum. A nice description and more details on GREEN MUZE.
How about including places like this in your geography curriculum ?
Next episode is on the theme of WATER....
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