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Scientific Investigations Map 2940 |
| TKmd-3. North face of Bonanza Peak [Tsw], highest nonvolcanic peak in the North Cascade Range at 9,511 ft elevation, viewed from south side of Mount Lyall. The massif is underlain by Marblemount meta-quartz diorite (TKmd). Photographed in 1980. |
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Other photos that show unit TKmd:
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