Home
Volcanoes
Webcams
News
Explore Data
Images
Get Involved
About AVO

Sample: 94SJP70B

Sample ID: 94SJP70B [1]
Station ID: 94SJP70B
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: Approximately 2-4' thick massive zone in an otherwise rubbly and blocky unit from the base of the capping wall-like andesite package at Site 7. Fine grained, vesicular, holocrystalline, seriate porphyritic with a matrix of mesostasis, opaque, plagioclase and alteration. Plagioclase phenocrysts (An39-An63) are up to 3.35 mm and often display sieve textured zones. Orthopyroxene phenocrysts are up to 0.7 mm and a few are sieve textured. Two different altered phases are present, one is now red to orange alteration, while the other is chlorite alteration.
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5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.