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Pacific Northwest Geologic Mapping and Urban Hazards

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Find North Cascades geologic maps

Mount Baker
Sauk River
Skykomish River
Snoqualmie Pass
Robinson Mountain
Twisp
Chelan
Wenatchee
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Rock samples collected between 1957 and 1992 in the North Cascades available at North Cascades National Park, Marblemount

generalized geologic map w/archived samples


Click map for enlarged version.

Representative rock samples of major North Cascade gelogic units are archived with North Cascades National Park in Marblemount, Washington. Approximately 3200 samples (shown here as dots), most with thin sections, and classified by geologic map unit are available. For information about this collection contact the Curator at Marblemount. Telephone 360 873 4500

This site is maintained by the Pacific Northwest Urban Corridor Geologic Mapping Project, part of the Geology, Minerals, Energy and Geophysics Science Center

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