© L.V. Zakharikhina

Research Geotechnological Center, Far East Branch of the Russian Academy of Sciences,
Petropavlovsk-Kamchatsky, 683002.

Using tephrochronological data (tephra - ash transported by air) on the eruption time of volcanoes in Kamchatka and age of the corresponding ashes that occur in wood soils it is shown that peculiarities of the soil formation related to the different stages of the volcanic activity can be estimated by comparing soils which had been formed in Holocene under the influence of the activity of southern group of volcanoes, where the mature caldera-forming stage of volcanism was the predominating, and volcanoes of northern group which activity can be paralleled with the early (basaltoid) phase of volcanism representing, thus, influence of the complete cycle of volcanism on the soil formation.