"Bullseye" type deposit, pumice on bottom, scoria on top. Pumice is currently ~20 cm which is minimum. Scoria above is very surficial, and is nota primary deposit. Digging into scoria "bed", it turns very fine in < 2cm (surface is coarse), then into silty stuff, then soily stuff. Pit was ~80 cm deep, and no pumice was found. Pumice airfall. Blonde, sparsely phyric, rare lithics. Largest clast ~3cm
Volcanism on Unimak Island, Alaska, USA: a special focus on Shishaldin and Fisher volcanoes
This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G19AC00060 and G19AC00171.
Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.