Spectacular blooms of wildflowers are carpeting the Merced River Canyon and you'll first spot the bursts of color —poppies, lupine, red bud and more — in Mariposa on your way to the Arch Rock ...

The Cambrian-age Tonto Group is a set of rocks famous for holding clues to the burst of new life that reshaped Earth 500 ...

But it’s just one of the thousands that line the Snake River Canyon in ... gravel.” The rock at the bottom left of the image shows the patination— the change of color from the rust colored ...

These canyons now boast smooth, undulating rock ... in Glen Canyon, Arizona. This famous stop, one of the most photographed ...

Dave Parker and Jeff Birchfield climb the ice in Bad Rock Canyon on Saturday ... winds between the Middle Fork of the Flathead River and the canyon wall. In the dead of winter, a 40-foot ...

T he river churns a muddy brown as it carries us through towering vermilion rock ... Canyon into the current reservoir boundary; gone is the sound of rushing river, and the water’s color has ...

Sometimes, as a river carves down through rock to make a canyon, it can leave behind small rock shelves on the canyon's walls. These flat terraces can end up covered with river sediments ...