USGS home Scientific Investigations Map 2940 

Pacific NW Geologic Mapping Project

Geologic maps of the North Cascades

QTcc-4. Rhyolite tuff and breccia (QTcc) that fill Kulshan caldera, upper Swift Creek [MBnw].
Other photos that show unit QTcc:

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