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Kola superdeep borehole in Murmansk region
October 1981. USSR. Murmansk Region. Chief geologist of the expedition Vladimir Stepanovich Lanev and senior geologist V. V. Vakhrusheva during the study of rock samples raised from a depth of 11,000 meters during the drilling of the Kola Superdeep Borehole. The exact date of the shooting has not been established. Semyon Maisterman/TASS