Glacial Lake Missoula
and the Ice Age Floods

Rainbow Lake, Montana, carved as the draining lake plunged down slope towards the Clark Fork River.

Old homestead in flood-cut coulee, Washington.

Palouse River, Washington, where the floods cut through fissures in the basalt.

Dry Falls, Washington.

Dry Falls, Washington, (it's vast).

Three-story rock in the plunge zone at the base of Dry Falls, Washington.

Frenchman Coulee, Washington, a receeding waterfall where flood waters drained from the Quincy Basin into the Columbia River.

Saddle Mountains, Washington:
Oversteepened slopes in the background cut by the floods gave way to massive slumps (landslides) seen in here in the foreground.

Rowena Gap, Columbia River between Oregon and Washington.

Multnomah Falls, Oregon.

Sentinel Rock, Washington, is the core of an old volcano exposed by the flood waters.

Prints are available for purchase, e-mail Mark

All images ©Mark Alan Wilson