AMS ¹⁴C Dating of Pollen Concentrate from Late Pleistocene Iсe Wedges from the Bison and Seyaha Sites in Siberia

• Main Authors: Vasil'chuk, Alla Constantinovna, Kim, Jong-Chan, Vasil'chuk, Yurij K
• Format: Dataset
• Language: English
• Published: PANGAEA 2020
• Subjects: 14C age; Iсe wedges; Late Pleistocene; Pollen; stable isotope composition; Kolyma; Yamal Peninsula; Ice; kolyma river; permafrost; wedge*; Siberia
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.919481; https://doi.org/10.1594/PANGAEA.919481

Accelerator mass spectrometry (AMS) radiocarbon dates of pollen concentrate were obtained from multistage syngenetic ice wedges of cross-sections from the Late Pleistocene Bison site, located along the Lower Kolyma River (68°34'N, 158°34'E), from ∼43,600 to ∼26,200 BP, and 3 AMS ¹⁴C dates of pollen concentrate in ice wedges from the Seyaha site cross-section, located on the east coast of the Yamal Peninsula (70°10'N, 72°34'E), from ∼22,400 to ∼25,200 BP. Pollen concentrate samples were prepared using a special pretreatment procedure. Pollen and spores from ice-wedge ice signalize a regional pollen rain. Therefore, ¹⁴C-dated extracts of pollen and spores from ice-wedge ice enable an adequate reconstruction and chronology of landscape dynamics on a regional scale. The pollen and spores were well preserved despite numerous redepositions in the penecontemporaneous structure in which they were found. Thus, a comparison with dates on other fractions from the same sample is necessary. The youngest date is the most reliable among the intersample AMS ¹⁴C dates from the ice and permafrost sediments.