Abstract
This paper describes the results of the grain-size and mineralogical studies of the deposits of the tsunami of 1994 on Shikotan, Tanfil’ev, and Kunashir islands. The studies were carried out within the portions of the coast with different configurations, geomorphologic structures, lithodynamical environments, and character of the tsunami manifestation. The composition of the tsunami deposits is shown to be controlled mainly by erosion-accumulative processes during the tsunami events and is in many respects inherited from the matter sources. The tsunami deposits contain marine diatom species, whose richest assemblages were found within the areas where the material from the underwater coastal slope was redeposited. The data concerning the deposits of earlier historical tsunamis encountered in the same cross sections are discussed too. Their examination points to a similar development of the erosional-accumulative processes during tsunami events with the same intensity and an entrainment of the matter from the same sources.
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Original Russian Text © N.G. Razzhigaeva, L.A. Ganzei, T.A. Grebennikova, A.A. Kharlamov, A.Ya. Il’ev, V.M. Kaistrenko, 2007, published in Okeanologiya, 2007, Vol. 47, No. 4, pp. 622–630.
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Razzhigaeva, N.G., Ganzei, L.A., Grebennikova, T.A. et al. Tsunami deposits of the Shikotan earthquake of 1994. Oceanology 47, 579–587 (2007). https://doi.org/10.1134/S0001437007040157
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DOI: https://doi.org/10.1134/S0001437007040157