C-14 AGES OF TEPHRA LAYERS FROM THE HOLOCENE DEPOSITS OF KUNASHIR ISLAND (RUSSIA FAR-EAST)

Holocene deposits from the central and southern regions of the Kunashi r bland contain tephra from 12 volcanic eruptions (Kn1-12). We studied radiocarbon data, mineralogical composition, and distribution of the tephra layers in different Holocene facies. The main sources of the Ho locene tephra samples were the volcanoes of Hokkaido Island. The distr ibution of ash layers on Kunashir Island allows us to estimate their d irection. Ash layers can be reliable markers for age determination of different coastal landforms on open oceanic shores. We propose here a tephrastratigraphical scheme for different Middle-Late Holocene facies .