Sample: 94SJP122B

Sample ID:	94SJP122B ^[1]
Station ID:	94SJP122B
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:	Rubbly outcrop of platy and blocky pieces of a dome at Site 15. Fine grained, vesicular, holocrystalline, porphyritic with a matrix of cryptocrystalline material, opaque, plagioclase and minor alteration. Plagioclase phenocrysts are up to 3.0 mm and occasionally have sieve textured zones, oscillatory zoning, and/or resorption embayments. Orthopyroxene phenocrysts are up to 0.3 mm. Opaque phenocrysts are up to 0.12 mm. One granular opaque mass may represent a dehydrated phase. 97.9% matrix, 0.8% plagioclase, 0.1% altered phase, 1.2% 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5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G22AC00137 and G23AC00070.

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.