The Grand Canyon is a marvel on the landscape of North America, a breathtaking geological feature in the southwestern U.S.

A new study suggests a proto–Colorado River filled a large basin before spilling westward to set the Grand Canyon’s modern ...

Learn how the Colorado River began flowing through the Grand Canyon during the late Miocene, after ancient lakes spilled over ...

Introducing the Grand Canyon / Stanley S. Beus, Michael Morales -- Precambrian crystalline core / R. S. Babcock -- Grand Canyon Supergroup : Unkar group / J. D. Hendricks, G. M. Stevenson -- Grand ...

Geology of the older precambrian rocks of the upper granite gorge of the Grand Canyon / R.S. Babcock, E.H. Brown, and M.D. Clark -- The younger precambrian rocks of the Grand Canyon / Trevor D. Ford ...

Snaking through the wild heartlands of northern Arizona, the world's most dramatic canyon is grand in name and grand in nature. Carved over millions of years by the Colorado River and ancient ...