USGS home Scientific Investigations Map 2940 

Pacific NW Geologic Mapping Project

Geologic maps of the North Cascades

Kot-1. View to west from near the summit of Bunker Hill [RMne]. Low-relief uplands, seen here at 7,000 ft elevation (2,200 m) in the Okanogan block, are typical of much of the northeast corner of the map area and probably reflect significantly less late Cenozoic uplift and incision than in the Methow and Chelan structural blocks west of the Pasayten Fault. Bedrock of Bunker Hill is Early Cretaceous tonalite and gneissic tonalite (our older tonalite, Kot). Prominent pyramid on skyline is Castle Peak.
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