Round Lake Erratic, Camas, Washington
Posted by: 
Rose Red
N 45° 36.011 W 122° 24.038
10T E 546743 N 5049801
According to the signboard at Round Lake, the massive boulder's rounded surface and huge shape suggests it was rolled along by the enormous, extremely fast moving flows of the Missoula Floods.
Waymark Code: WM36CY
Location: Washington, United States
Date Posted: 02/17/2008
Views: 38
According to the signboard at Round Lake, during the last ice age, 15,000 to 18,000 years ago, huge glacial dams captured water in a series of large western Montana lakes known as Lake Missoula. The huge lakes were up to 2,000 feet deep and covered as much as 3,000 square miles.As the ice age came to a close, these gigantic ice dams formed and burst as many as 40-100 times over the 2,000-2,500 year period causing one of the largest known floods on earth.
Walls of water, from 500 to 1,000 feet high and moving as speeds up to 50-55 miles per hour, rushed across the Idaho panhandle, central Washington and through the Columbia River Gorge. Vast low lying areas were flooded as the deluge swept out of the gorge and backed up at the Kalama Narrows all the way to present-day Eugene. The floods powerful force carried massive debris (including “erratics”) and scoured out depressions where the ground was easy eroded. These areas later became lakes such as Lacamas and Round Lakes.