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Sample: 94SJP58B

Sample ID: 94SJP58B [1]
Station ID: 94SJP58
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: A 2-3' thick dike that has been boudinaged and cuts through brecciated unit (sBA9) at Site 12. 94SJP58B is about 40' south of 94SJP58A. Fine grained, hypocrystalline, trachytic, intersertal, seriate porphyritic with a matrix of brown glass, opaque, plagioclase, microlites, clinopyroxene and olivine. Plagioclase phenocrysts (An32-An57) are up to 1.7 mm and display minor normal zoning; sieve textured cores are uncommon. Olivine phenocrysts are up to 2.0 mm and a few are swallow-tailed or skeletal. Clinopyroxene phenocrysts are up to 2.25 mm. Orthopyroxene are up to 0.6 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5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.