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Text Description: Unit T3; Layer A; 62 cm thick; Stratified (see below), poorly sorted, v. coarse bombs supported in sandy matrix, black scoria of variable vesicularity, red phenocryst-rich andesite and glassy black andesite lithic bombs. 5 cm fine, 4 cm coarse, 7 cm fine, 10 cm coarse, 10 cm fine, 15 cm coarse, 20 cm fine References:  The 1931 eruption of Aniakchak volcano, Alaska Variations in eruption style during the 1931 A.D. eruption of Aniakchak volcano, Alaska |
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