Аннотация:In vicinity of Kalgalaksha in the lacustrine-bog deposits core we found a layer of gravel with
a clay-silt-sand filler. The granulometric composition indicates high hydrodynamic conditions
of the its formation. Diatom analysis of the material, during which the shells of marine and
brackish-water diatoms were discovered, complements the representation of the layer as a
result of a tsunami.