USGS home Scientific Investigations Map 2940 

Pacific NW Geologic Mapping Project

Geologic maps of the North Cascades

Kpc-1. View east into Pipestone Canyon [Tne] and gently dipping fluvial sandstone and conglomerate of the Late Cretaceous Pipestone Canyon Formation (Kpc). Beyond the Pasayten Fault, Early Cretaceous and Jurassic mylonitic granodiorite, gneissic trondhjemite, and banded gneiss (KJog) underlie the slopes of the Okanogan block. View image without annotation
Other photos that show unit Kpc:

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Photo Indices: Captions (Additional photos home) | Map | Young rocks and deposits | Older rocks west | Older rocks east