USGS home Scientific Investigations Map 2940 

Pacific NW Geologic Mapping Project

Geologic maps of the North Cascades

Kps-1. Pebble conglomerate of the Virginian Ridge Formation of Barksdale (1975) in Pasayten Group of Kiessling and Mahoney (1997) (Kps) exposed north of Cady Pass [RMsw]. Weathering has reduced the matrix since the late Pleistocene Cordilleran Ice Sheet cut and polished harder chert pebbles.
Other photos that show unit Kps:

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