Sample: K-2557
| Sample ID: | K-2557 [1] |
| Station ID: | K-2557 |
| AT Num: | |
| Volcano: | Snowy |
| Possible source: | |
| Eruption: | |
| Collector: | Unknown, Unknown |
| Date sampled: | |
| Sample type 1: | Lava |
| Color: | |
| Final unit: | |
| Text Description: | SW Snowy volcano. Basal lava flow on basement at 4000-ft point, 3.3 km NNW of Peak 6770. Sample has a whole-rock K-Ar calculated age of 199 +/- 9 ka (Hildreth and others, 2001). Sample in thin section is 15% plagioclase, to 2.5 mm; 5-7% subequal amounts of clinopyroxene and orthopyroxene, to 2 mm; 1% oxides, to 0.3 mm; trace olivine, sieved plagioclase present in a few grains; oxide-pyroxene-plagioclase aggregates are present. |
| Sample Location: |
References Cited
[1] Snowy Mountain: A pair of small andesite-dacite stratovolcanoes in Katmai National Park, 2001
Hildreth, E. W., Fierstein, Judy, Lanphere, M. A., and Siems, D. F., 2001, Snowy Mountain: A pair of small andesite-dacite stratovolcanoes in Katmai National Park: in Gough, L. P. and Wilson, F. H., (eds.), Geologic studies in Alaska by the U.S. Geological Survey, 1999, U.S. Geological Survey Professional Paper PP 1633, p. 13-34.
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