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Hydrology, Hydraulics, and Geomorphology of the Bonneville Flood

1993; Geological Society of America; Linguagem: Inglês

10.1130/spe274-p1

2331-219X

Jim E. O’Connor,

Archaeology and Natural History

Approximately 14,500 yr ago, Pleistocene Lake Bonneville discharged 4,750 km3 of water over the divide between the closed Bonneville basin and the watershed of the Snake River. The resulting flood, released near Red Rock Pass, Idaho, followed the present courses of Marsh Creek, the Portneuf River, and the Snake and Columbia Rivers before reaching the Pacific Ocean. For 1,100 km between Red Rock Pass and Lewiston, Idaho, the Bonneville Flood left a spectacular array of flood features that have allowed for geologic reconstruction and quantitative evaluation of many aspects of the flood hydrology, hydraulics, erosion, and sediment transport.