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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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Geologic Map of the Snoqualmie Pass 1:100,000 scale quadrangle, I-2538 published in 2000; digital version 2000

Reduced image of the geologic map of the Snoaualmie Pass quadrangle


Link to downloadable PDF file and database of the geologic map, correlation of units, cross section(s) and description of the map units (8.1 MB) and/or PDF file of the pamphlet, illustrations and tables (632 KB).

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This site is maintained by the Pacific Northwest Urban Corridor Geologic Mapping Project of the Geology and Geophysics, Geologic Division, U.S. Geological Survey

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This site last updated January 12, 2007