The relationship between glacifluvial and marine formations on the southern coast of the Kola Peninsula: new data

On the southern coast of the Kola Peninsula, the relationship between meltwater and marine forma- tions at the mouths of the Olenitsa, Varzuga and Indera rivers was studied using geomorphological, ground penetrat- ing radar and paleolimnological methods. It has been established that below the «upper marine boundary», the sands of kamas and fluvioglacial deltas are completely or partially redeposited in the coastal zone. The contact between glacifluvial and marine sediments was recorded: at the mouth of the Olenitsa Rriver at ~ 40 m, on the right bank of the Varzuga River – 45 m, and between the mouths of the Varzuga and Indera rivers – 24–29 m a. s. l. Preliminary data from paleolimnological studies and 14C dating of bottom sediments of lakes Beloye (18.2 m а. s. l.), Chernoye (24.6 m а. s. l.), Gagarye (24.6 m а. s. l.) and «Eight» ( 26.2 m a. s. l.), suggest that the dead ice massif was per-sisted up to 11.4–11.1 cal. ka BP between the mouths of the Varzuga and Indera rivers. It prevented the penetration of Late-Glacial transgression waters into the lake basins and limited the possibility of the impact of coastal processes on glacial formations.