Halfway up, scoria bed, agglutinate Maar (breccia) stuff is thick,well stratified cap, that swells (thickens) in swail valley (up to 50 m thick). Seems to follow slope of underlying seds, as seen in scoria bed. See sketch in field notes. Black, nearly aphyric scoria
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 G22AC00137
Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.