USGS home Scientific Investigations Map 2940 

Pacific NW Geologic Mapping Project

Geologic maps of the North Cascades

KJn-1. Sandstone and argillite of the Nooksack Formation (KJn) on Chowder Ridge [MBnw]. Note well-developed graded beds and filled burrows to right of ice ax.
Other photos that show unit KJn:

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