University:
Amherst College
Course:
GEOL 111 | Planet Earth: Introduction to Geology
Academic year:

2024
Views:

23

Pages:

19
Author:

Rebecca Edwards

Shoshone Falls on the Snake River, Idaho BASALT FLOW TRACHYTE FLOW COLUMBIA PLATEAU AND SNAKE RIVER PLAIN LARGE IGNEOUS PROVINCES TYPICAL MANTLE CONVECTION MANTLE PLUME MODELS Wave cut terraces demonstrate the height of Lake Bonneville in Utah Lake Bonneville shoreline terraces Width of Snake River Canyon carved by catastrophic flood waters Now-dry alcoves at Blue Lakes carved by catastrophic flood flow Flood debris from carving canyons and alcoves Photo by Michael Light ‘86 “....the approach to the Shoshone. You ride upon a waste, - the pale earth stretched in desolation. Suddenly you stand upon a brink, as if the earth had yawned. Black walls flank the abyss. Deep in the bed a great river fights its way through labyrinths of blackened ruins, and plunges in foaming whiteness over a cliff of lava. You turn from the brink as from a frightful glimpse of the Inferno.” “Sweeping catastrophism is an error of the past. Radical uniformitarianism, however, persists, and probably controls the faith of a majority of geologists and biologists.” Clarence King address at Yale, 1877

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