July 11, 2009...2:19 pm

What I did on my summer vacation — so far

Palouse Falls, Washington

Palouse Falls, Washington

From the Wiki:

The canyon at the falls is 115 meters (377 feet) deep, exposing a large cross-section of the Columbia River Basalt Group. These falls and the canyon downstream comprise an important feature of the channeled scablands created by the great Missoula Floods that swept periodically across eastern Washington and across the Columbia River Plateau during the Pleistocene epoch.

The ancestral Palouse river flowed through the currently dry Washtucna Coulee to the Columbia River. The Palouse Falls and surrounding canyons were created when the Missoula Floods overtopped the south valley wall of the ancestral Palouse River, diverting it to the current course to the Snake River by erosion of a new channel.

Down river from the falls...

Down river from the falls...

Much of Washington, Oregon, and parts of Idaho are located on the Columbia River Basalt Group — the largest flood basalt group in this country.  I find basalt formations so very beautiful and interesting.

Twisting and turning basalt columns

Twisting and turning basalt columns

It was 95 degrees at the falls yesterday, but some of the green is still holding on.  Makes for some nice contrast. The heat kept the rattlesnakes in their hidey holes, thank goodness.

All photos by Zooey

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