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Sample: 06AUMC012b

Sample ID: 06AUMC012b [1]
Station ID: 06AUMC012
AT Num:
Volcano: Augustine
Possible source:
Eruption: Augustine 2005/12
Collector: Coombs, M. L.
Date sampled: 2006-05-13
Sample type 1: Lava
Color: dark greyish-green
Final unit: 2006_EfBa
Text Description: Selective sample of the darker portion of an angular, dense, 1.3x1x1 m banded block (lighter portion is sample 06AUMC012a). This portion is dark grayish-green porphyritic andesite with a glassy groundmass and distinct, equant plagioclase up to 3-4 mm long, and pyroxene and hornblende? phenocrysts. Contact between the lighter and the darker bands varies from sharp to gradational to irregular.
Sample Location:

References Cited

[1] Petrology and geochemistry of the 2006 eruption of Augustine Volcano, 2010

Larsen, J.F., Nye, C.J., Coombs, M.L., Tilman, Mariah, Izbekov, Pavel, and Cameron, Cheryl, 2010, Petrology and geochemistry of the 2006 eruption of Augustine Volcano, chapter 15 of Power, J.A., Coombs, M.L., and Freymueller, J.T., eds., The 2006 eruption of Augustine Volcano, Alaska: U.S. Geological Survey Professional Paper 1769, p. 335-382 and spreadsheets [http://pubs.usgs.gov/pp/1769/chapters/p1769_chapter15].