Hells Canyon viewed from Pittsburg Saddle, Idaho County. In the background an angular unconformity is visible between the lower basement and the Columbia River Basalt above.
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U of I campus
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Current IGS geologic mapping projects
New IGS publications
Idaho Geological Survey
Annual Report for
Fiscal Year 2017
Soda Springs Earthquake
Sequence information and analysis by the
U.S. Geological Survey
Contact Idaho Geological Survey