Five-cm-thick tephra layer that is 45 cm from the base of the 1912 Novarupta fallout layer. Pl>mica>>cpx>=opx(+tr green amphibole); opx:cpx = 1:1. Median diameter is 0.10 mm and maximum pumice length is 3 mm.
Explosive eruptive record in the Katmai region, Alaska Peninsula: an overview
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