Lake Lewis

elevation

Lake Lewis reached an elevation of about 1,200 feet (370 m) above sea level (today’s sea level) before subsiding.

flooded rivers

Lake Lewis backflooded into the Yakima, Walla Walla, Touchet and Tucannon River Valleys.

formation

Lake Lewis was formed when the restricted flow of waters from periodic cataclysmic floods from Glacial Lake Missoula, pluvial Lake Bonneville, and perhaps from subglacial outbursts, backed up through the constriction formed by the Wallula Gap in the Horse Heaven Hills (southern Washington).

formed by

lake in

lake in the paleocourse of

Columbia River

random

Now when Jesus saw the crowds, he went up on a mountainside and sat down. His disciples came to him, Matthew 5:1 NIV

slack waters

In these relatively calm arms of the lake [Lewis], the slack waters deposited the suspended materials eroded from the scabland regions north of Lake Lewis, and redeposited them in pronounced layers before receding.

tags

lake
former lake
transient lake
no OpenStreetMap element

Wikidata

https://www.wikidata.org/wiki/Q3215010

Wikimedia

https://commons.wikimedia.org/wiki/Category:Lake_Lewis

Wikipedia

Lake Lewis (Wikipedia) Lake Lewis was a large transient lake (lasting only days to weeks) in the Pacific Northwest region of North America, formed by periodic Missoula Floods along the Columbia River paleocourse between 21,000 and 16,000 years ago.