Sample: 94SJP99A

Sample ID:	94SJP99A ^[1]
Station ID:	94SJP99A
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:	Downdropped block from surrounding cliffs at Tanada Peak volcano. Fine grained, holocrystalline, intergranular, seriate porphyritic with a matrix of mesostasis, alteration, opaque, plagioclase, clinopyroxene and orthopyroxene. Plagioclase phenocrysts (An38 - An61) are up to 1.75 mm and commonly have sieve textured zones, oscillatory zoning, and resorbed edges. Orthopyroxene phenocrysts are up to 1.3 mm. Olivine? phenocrysts are now altered and may be surrounded by small pyroxene crystals. Clinopyroxene phenocrysts are up to 0.32 mm.
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5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.

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