Yu.I. Blokh1, V.I. Bondarenko2, V.A. Rashidov3, A.A. Trusov4

1Russian State Geological Prospecting University, Moscow, 117873, Russia
2Kostroma State University, Kostroma, 156000, Russia
3Institute of Volcanology and Seismology, Far East Division. Russian Academy of Sciences, Petropavlovsk-Kamchatskii, 683006, Russia
4ZAO GNPP «Aerogeofizika», Moscow, 107140, Russia

The authors have studied the flat-topped Berg submarine-volcano. The volcano likely used to emerge above sea level in its past history, but suffered the top attrition subsequently. The edifice is composed as by dense rocks with prevailing andesibasalts and basalts, so by mouldy volcanic rock formations. The most magnetized lava flows effused near the top on the western slope after the volcano had sunk. These flows are possibly composed by basalts and are the youngest within the edifice.

Keywords: submarine volcanic activity, Berg, Kurile arc, igneous rocks