Sample: 85ARh-17
| Sample ID: | 85ARh-17 [1] |
| Station ID: | 85ARh-17 |
| AT Num: | |
| Volcano: | |
| Possible source: | |
| Eruption: | |
| Collector: | Richter, D. H. |
| Date sampled: | 1985-00-00 |
| Sample type 1: | Tephra Fall |
| Color: | |
| Final unit: | |
| Text Description: | Wrangell Lava. Dacite agglutinate (Tertiary) - Extensive but relatively thin (25-35 m) dacite (64.8% - 65.5% SiO2; map nos. 20-22) agglutinate consisting of densely welded flattened pumice, stretched glass fragments (fiamme), and equidimensional lithic fragments exhibiting a well developed eutaxitic texture. Rock is sparsely porphyritic containing phenocrysts of plagioclase (1-5%), minor clinopyroxene, and occasional rounded quartz and olivine. Agglutinate appears to be single flow interlayered in unit Tsl. |
| 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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