Sample: 85ARa-43
| Sample ID: | 85ARa-43 [1] |
| Station ID: | 85ARa-43 |
| AT Num: | |
| Volcano: | |
| Possible source: | |
| Eruption: | |
| Collector: | Ratte, J. C. |
| Date sampled: | 1985-00-00 |
| Sample type 1: | Other |
| Color: | |
| Final unit: | |
| Text Description: | Wrangell Lava. Quartz diorite (Tertiary) - Chiefly medium-grained, subhedral granular quartz diorite (64.1% SiO2; map no. 32) containing plagioclase, quartz, orthoclase, clinopyroxene, and minor hornblende and biotite. Locally highly altered. Variants include fine-grained plagioclase-rich rock containing small sparse phenocrysts of plagioclase, hornblende, and clinopyroxene in a felty microcrystalline groundmass. Probably mostly subvolcanic and a variant of the diorite intrusive (unit Tdd). |
| Sample Location: |
References Cited
[1] Geologic map of the McCarthy D-1 Quadrangle, Alaska, 2000
Richter, D. H., Ratte, J. C., Leeman, W. P., and Menzies, Martin, 2000, Geologic map of the McCarthy D-1 Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I 2695, unpaged, 1 sheet, scale 1:63,360.
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