Geology in the United States

A striking geological formation in Southern California.

An enormous boulder deposited by the Scabland floods lies in the Quincy Basin among a host of smaller boulders.

An attractive free-plunge waterfall outside Bend in the Deschutes National Forest.

A narrow fjord-like lake, the third-deepest in the United States, runs for over 50 miles into the Cascades of Washington state.

This U.S. natural reserve is an ancient spiritual place and rock climber’s paradise.

Idaho’s largest, deepest limestone cave is known for its quirky rock formations and bat population.

This often-overlooked canyon dazzles and intrigues with its many layers of colors, shapes and odd formations.

An unusual double cinder cone with a bent oval crater, in the Lunar Crater Volcanic Field.

Some 46,000 years ago, a volcanic eruption led to a flooding event that carved this short canyon with steep vertical walls.

Spectacular 300-foot cliffs in a lush mountain canyon.

The rocks exposed at Valley of Fire State Park also occur in a much less known but equally spectacular area a few miles to the southwest.

A family-owned store specializing in minerals, geodes, gemstones, and more.

An improbable sinkhole in the sediments flanking the Beaver Dam Mountains.

This sandstone marvel of nature is worth a stop along Highway 65.

The "Grand Canyon of Southwestern Idaho" makes a spectacular gash across the flat Snake River plain.

Rocky outcrops containing overhangs, caves, fissures, clefts, and alcoves that invite exploration and scrambling.