Variations of δ¹⁸О in Late Pleistocene ice wedges, in structure-forming ice and segregated ice lenses, as well as in snow and water of Burguat River were determined. The studied section of the yedoma strata has been exposed in an outcrop of the slope sediments on a gentle slope in the foothills of Kular Ridge, nearby Kular Settlement, on the right bank of the Burguat River, 0.5 kilometers from the mouth of the Emis Creek.

In the field, the samples of ice wedges for isotope and chemical analysis were sampled out of the axial parts of the wedges from the main outcrop wall with an interval of 0.2 to 0.5 m using the sampling method elaborated by Yu.K. Vasil'chuk (1992). The isotopic composition of ice wedges has been determined at the Tallinn Institute of Geology.