Lithofacies, eruptive phases and processes of Udo monogenetic multiple volcano near Jeju Island, South Sea, Korea

A monogenetic multiple volcano was emergent on Udo island, 3 km offthe sea shore of the eastern promontory of Jeju Island, South Sea,Korea. All of the preserved volcanic successions occur in a regular pattern of sequences,representing an excellent example of an eruptive cycle. The island represents volcanic stratigraphy that comprises a horseshoe-shaped tuff cone, a nested cinder cone on the crater floor of the tuff cone,and basalt lavas which extend northwest from the moat between tuff and cinder cones. The volcanic stratigraphy suggests eruptive styles that start with emergent Surtseyan eruption, progressing through Strombolian eruption and end with lava effusion.