Sample: 94SJP40A

Sample ID:	94SJP40A ^[1]
Station ID:	94SJP40A
AT Num:
Volcano:	Skookum Creek
Possible source:
Eruption:
Collector:	Preece, S. J.
Date sampled:	1994-00-00
Sample type 1:	Tephra Fall
Color:
Final unit:
Text Description:	Scoria from Site 6. Fine-grained, vesicular, intersertal, hypocrystalline, porphyritic with a matrix is very dark glass. Plagioclase phenocrysts (An39 - An61) have two populations: 3.05-0.4 mm, with sieve textured zones; and 1.6-0.05 mm with complex zoning and lacking sieve textured zones. Olivine phenocrysts are 1.05-0.1 mm and some have skeletal habits or opaque inclusions. Clinopyroxene phenocrysts are up to 0.8 and twinning is common. 61.5% matrix, 4.9% plagioclase, 0.4% olivine, 0.7% clinopyroxene, 32.5% 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5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.

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