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Pacific NW Geologic Mapping Project

Geologic maps of the North Cascades

TKgo-1. Eldorado Orthogneiss (granodioritic orthogneiss, TKgo) exposed on Forbidden Peak [MBse], viewed from summit ridge of Johannesburg Mountain [SRne] to the southwest. The zig-zag drainage pattern reflects strong jointing in the gneiss. Photographed in 1958.
Other photos that show unit TKgo:

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