Geothermal minerals paint Wyoming canyon walls yellow orange above turquoise winter water
Steam rises from the Yellowstone River as your snowcoach pulls to a stop at Artist Point. Through the frosted window, yellow and orange canyon walls emerge like a geological sunrise. These aren’t the typical gray cliffs of most river canyons. Here, underground heat has spent millennia painting rhyolite rock with iron oxide and sulfur compounds, … Lire plus









