Sample: 84ARh-41A
| Sample ID: | 84ARh-41A [1] |
| Station ID: | 84ARh-41A |
| AT Num: | |
| Volcano: | |
| Possible source: | |
| Eruption: | |
| Collector: | Richter, D. H. |
| Date sampled: | 1984-00-00 |
| Sample type 1: | Lava |
| Color: | |
| Final unit: | |
| Text Description: | Wrangell Lava. Rhyolite flows (Tertiary) - Thick (as much as 200 m), light-colored and intricately flow-banded rhyolite (74.6% SiO2; map no. 16) lava containing abundant, pristine black obsidian. Unit locally includes as much as 2 m of overlying rhyolitic lapilli tuff and 10 m of rhyolitic volcanic sandstone. Non-devitrified glass contains sparse microphenocrysts of clinopyroxene, orthopyroxene, and zircon |
| 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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