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Weathering and Soil | Geology IN How soil is formed.     ......By far our most important mineral resources are found in the form often denigrated as dirt.

Weathering and Soil | Geology IN How soil is formed. ......By far our most important mineral resources are found in the form often denigrated as dirt.

Lake Bonneville in late Pleistocene 14,500 years before present. The Pleistocene lakes are shown in light blue. The modern Great Salt Lake shown in dark blue. The flood wave broke through at Red Rock Pass and spread northward into Idaho and Oregon along the Snake River until it reached Scablands in Washington, then it followed the route of the Missoula flood waves to the sea along Columbia river.

Lake Bonneville in late Pleistocene 14,500 years before present. The Pleistocene lakes are shown in light blue. The modern Great Salt Lake shown in dark blue. The flood wave broke through at Red Rock Pass and spread northward into Idaho and Oregon along the Snake River until it reached Scablands in Washington, then it followed the route of the Missoula flood waves to the sea along Columbia river.

Geologic Map of the Island of Hawaii As art, it would look more interesting if the sea was coloured and detailed in some may.

Geologic Map of the Island of Hawaii As art, it would look more interesting if the sea was coloured and detailed in some may.

Walker, J.D., and Geissman, J.W., compilers, 2009, Geologic Time Scale: Geological Society of America, doi: 10.1130/2009.CTS004R2C. ©2009 The Geological Society of America.

Walker, J.D., and Geissman, J.W., compilers, 2009, Geologic Time Scale: Geological Society of America, doi: 10.1130/2009.CTS004R2C. ©2009 The Geological Society of America.