Sample: 94SJP123

Sample ID:	94SJP123 ^[1]
Station ID:	94SJP123
AT Num:
Volcano:	Skookum Creek
Possible source:
Eruption:
Collector:	Preece, S. J.
Date sampled:	1994-00-00
Sample type 1:	Lava
Color:
Final unit:
Text Description:	Blocky andesite flow. Outcrop is spire-like with 1 -2’ diameter blocks in a finer matrix of ash or altered andesite at Site 15. Fine grained, vesicular, holocrystalline, seriate porphyritic with a matrix of mesostasis, opaque and plagioclase. Plagioclase phenocrysts (An39 - An60) are up to 3.55 mm and commonly have sieve textured zones, oscillatory zoning, and resorption embayments. Orthopyroxene phenocrysts are up to 1.2 mm. Clinopyroxene phenocrysts are up to 2.62 mm. Opaque phenocrysts are up to 0.4 mm. Trachyandesite.
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5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.

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