Scientific Investigations Map 2940
Pacific NW Geologic Mapping Project
Geologic maps of the North Cascades
Kt
-5. Close view of magmatic layering in hornblende gabbro of Riddle Peaks pluton (
Kt
). Outcrop at head of Hilgard Creek, north of Holden [Tsw].
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Map
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Young rocks and deposits
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Older rocks west
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Older rocks east