Sample is a non-vesicular 10-cm enclave. Small plag laths dominant; mafics very fine grained. Sample in thin section is 30-40% plagioclase to 1 mm; 15 (?)% clinopyroxene less than 0.1 mm; 5 (?)% oxides less than 0.1 mm; no (?) olivine, no clots, and no sieved plag.
Snowy Mountain: A pair of small andesite-dacite stratovolcanoes in Katmai National Park