Аннотация:New data on the structure and isotopic composition of massive ice beds on the west coast of the Baydaratskaya Bay, Kara Sea, is presented. Unlike the adjacent sections with large deposits of massive ice, attributed by part of the authors to the buried glacial ice, the outcrop studied in 2012 has intrasedimental nature. It shows the complexity of the history of cryogenesis and the need for detailed study of the massive ice beds complex for the accurate reconstruction of the conditions of its formation.