Dugway Geode Beds

USA / Utah / Dugway /
 interesting place  Add category
Approximately 6 to 8 million years ago (Miocene epoch), volcanic activity occurred in western Utah and deposited an extrusive igneous rock called rhyolite. Trapped gasses formed cavities within the rhyolite, and millions of years of ground-water circulation allowed minerals to precipitate into the cavities. The result is geodes with spherical shapes and crystal-lined cavities.
Nearby cities:
Coordinates:   39°53'5"N   113°8'36"W
This article was last modified 17 years ago