Robuta

https://www.usgs.gov/publications/history-snake-river-canyon-indicated-revised-stratigraphy-snake-river-group-near
A discovery that debris left by the Bonneville Flood (Melon Gravel) overlies McKinney Basalt about 200 feet above the Snake River near King Hill requires that...
snake river canyonhistoryindicatedrevisedstratigraphy