This paper is an overview of the study of perennially frozen deposits outcropping in the coastal cliffs of the western and eastern parts of Bely Island. The obtained results provide information about the composition, structure, stratigraphy, origin and age of Quaternary deposits. It has been established that the cross-section consists of three main units: the lower silts and clays formed during MIS 3 in the marine conditions; the middle sandy unit accumulated between 9 and 5 kA BP as a result of small-scale local relative sea level rise; the upper unit consisting of clays, loam, peat and aeolian sands of terrestrial origin formed in the Late Holocene.