Roadside Geology of Yellowstone CountryWith more than 10,000 geysers, hot springs, fumaroles, and mud pots, as well as cubic mile upon cubic mile of once incendiary rhyolite, the landscape of Yellowstone Country vividly displays its fiery past and present. The region contains 1 5 of the worlds geysers, including the most famous of them all, and is the setting of some of Earths most destructive volcanic eruptions. The 19 road guides in Roadside Geology of Yellowstone Country fully explore