Bonneville Flood

deposits

The Touchet beds consists of coarse to fine sand and silt rhythmites which were deposited during multiple Missoula Floods, around 18,400 to 15,700 calendar years ago, and during the Bonneville Flood that occurred in approximately 18,000 calendar years ago

extent

Its waters [Bonneville Flood] eventually reached the Pacific Ocean via the Columbia River.

flood in

flood of

formed

Lake Lewis

Lake Lewis

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).

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westbound on U.S. Route 2

tags

flood

volume

At the peak of the flood, approximately 33,000,000 cubic feet per second (930,000 m3/s) poured over the Snake River Plain at speeds of up to 70 miles per hour (110 km/h) and deposited hundreds of cubic miles of sediments eroded from upstream.

Wikidata

https://www.wikidata.org/wiki/Q4942250

Wikimedia

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

Wikipedia

Bonneville Flood (Wikipedia) The Bonneville flood was a catastrophic flooding event in the last ice age, which involved massive amounts of water inundating parts of southern Idaho and eastern Washington along the course of the Snake River. Unlike the Missoula Floods, which also occurred during the same period in the Pacific Northwest, the Bonneville flood happened only once.