The United States is home to some of the most diverse landscapes in the world. From red rock deserts to towering mountains, the huge variety of natural formations makes America a veritable playground ...

The origin story of Hells Canyon, North America's deepest river gorge, has long been unclear to scientists. But new research estimates it formed about 2.1 million years ago when a dramatic flood event ...

The Tennessee River Gorge is a 26-mile canyon formed by the Tennessee River as it cuts through the Cumberland Plateau west of Chattanooga. The canyon separates Signal Mountain and Walden's Ridge on ...

PHILADELPHIA -- Ohio State University geologists have found that important rocks from Niagara Gorge -- rock formations that are used to judge the ages of rocks and fossils around North America -- ...