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Pacific NW Geologic Mapping Project

Geologic maps of the North Cascades

Kt-3. Cretaceous tonalite dike of Clark Mountain stock (Kt) intruding Napeequa Schist (Kns). Rotated schist fragments show magmatic nature of the deep-seated synorogenic pluton. Outcrop at head of Boulder Creek near Boulder Pass [Tsw].
Other photos that show unit Kt:

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