Large Dugway Geode (with stand) Marcasite with Barite and Pyrite while others had large eyes

while others had large eyes with thousands of lenses which enabled the creature to see 360 degrees

The American Mastodon was among the largest land animals that lived during the Pleistocene period (Ice Age / ~2 million - 11

Mosasaurs gave birth to live young

where silicates bond with the cellulose structure of the wood

Large Dugway Geode (with stand) Marcasite with Barite and Pyrite while others had large eyesWhen volcanic activity occurred in what is now western Utah some 8 million years ago, deposits of the igneous rock rhyolite formed. As the rock cooled, pockets of volcanic gases became trapped and formed cavities. The circulation of groundwater allowed silica and other minerals to precipitate into these cavities and form layers of agate and crystal quartz over the course of millions of years. Today the result is a beautiful and unique variety of