is the most famous example of a Surtseyan eruption. Although similar in nature to
phreatomagmatic eruptions, there are several specific characteristics: • Physical nature of magma: mafic to felsic. • Character of explosive activity: violent ejection of solid, warm fragments of new magma; continuous or rhythmic explosions; Pumice rafts if intermediate or felsic in composition;
base surges. • Nature of effusive activity: short, locally
pillowed,
lava flows (which are rare). • Nature of dominant ejecta: lithic, blocks and ash; pumice (if felsic or intermediate); often accretionary lapilli; spatter, fusiform
bombs and
scoria lapilli absent. • Structures built around vent: tuff rings ==Examples of Surtseyan eruptions==