... introduce the name “Poseidic” for this end-member style of submarine basalt explosivity. Poseidic eruptions are identifiable from measurable features in pyroclasts, and are possible at all subaqueous basaltic volcanoes. * E-mail: [email protected] . 21 4 2009 30 9 2009 14 10...

..., commonly form by adhesion of damp ash to a nucleus of ice or rock. They are a well-known product of phreatomagmatic eruptions ( Moore et al., 1966 ; Lorenz, 1974 ; Self, 1983 ), and occasionally form when meteoric moisture wets ash in eruption plumes ( Folch et al., 2010 ). Different types can...