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Sample: 93SJP28

Sample ID: 93SJP28 [1]
Station ID: 93SJP28
AT Num:
Volcano: Skookum Creek
Possible source:
Eruption:
Collector: Preece, S. J.
Date sampled: 1993-00-00
Sample type 1: Lava
Color:
Final unit:
Text Description: Blocky, rubbly outcrop from Dome A at Site 2. Fine grained, vesicular, holocrystalline, porphyritic with a matrix of equigranular feldspar, quartz?, opaque and zircon. Plagioclase phenocrysts (An24) are up to 1.5 mm and some have polysynthetic twinning, but untwinned feldspar also is present. Symplectic intergrowths of feldspar and quartz are up to 0.15 mm. There is an altered grain, amphibole?, consisting of an opaque aggregate with a small core. 91.7% matrix, 2.6% plagioclase, 5.7% vesicles.
Sample Location:

References Cited

[1] Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex, 1997

Preece, S. J., 1997, Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.