Geologic Map of
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Compiled from nearly 100 sources, including work from the U.S. Geological Survey, Idaho Geological Survey, and academic institutions.

Advances in geochronology from more than forty studies helped in the construction of this map by improving the understanding of Idaho geologic history.

Shows faults, including those active within the last 15,000 years.

Shows rocks and sediments with ages from 2.7 billion years to the present day.

Includes six geologic cross sections that schematically show the upper 15 km of crust under Idaho.

The shaded relief background to the map was constructed from digital elevation data and highlights the surface features of the state.

Shows the deposits of both the Missoula and Bonneville catastrophic floods.

Comes with a booklet.
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