The 7 Natural Wonders of America: A National Geographic Guide

The Grand Canyon faces an uncertain future as persistent drought conditions threaten the Colorado River, the force responsible for carving the landscape. Spanning 18 miles at its widest and over a mile deep, the canyon serves as a geologic record containing rock layers up to 1.8 billion years old, according to photojournalist and National Geographic … Read more

Happy 25th Birthday YVO! | U.S. Geological Survey

Beyond the Bubble: The Future of Monitoring the Yellowstone Caldera For a quarter-century, the Yellowstone Volcano Observatory (YVO) has served as the sentinel for one of the most powerful magmatic systems on Earth. What began as a serendipitous conversation between geologists at Lassen Volcanic National Park has evolved into a sophisticated, multi-agency consortium. But as … Read more