The Keivsky area of about 10,000 km2 is located in the central part of the Kola Peninsula between Efim-lake, the village of. Kanevka, the northern foot of the Keiva upland and the Ponoy River. Structurally, it corresponds to the Keiva synclinorium, stretching northwestward and joining the Voronyinsko-Poroso-Zersky in the northwest and the Imandra-Varzugsky in the south ...