EVIDENCE OF PERMAFROST IN PALEOSOLS: CRYOTRACEOLOGICAL APPROACH
V.S. Sheinkman1–3, S.N. Sedov1–4, A.V. Rusakov5, V.P. Melnikov1–3
1Tyumen State University, 6, Volodarskogo str., Tyumen, 625003, Russia; vlad.sheinkman@mail.ru
2Tyumen Industrial University, 36, Volodarskogo str., Tyumen, 625000, Russia
3Earth Cryosphere Institute, Tyumen Science Center SB RAS, 86, Malygina srt., Tyumen, 625026, Russia
4Instituto de Geología, Universidad Nacional Autónoma de México (UNAM), CP 04510, Coyoacán, CdMx, Mexico
5St. Petersburg State University, 41, Sredniy ave., St. Petersburg, 199000, Russia
Freezing of rocks and formation of permafrost affect soils and produce specific signatures in their solid matrix. The macro- and micromorphological signatures of frost effects remain preserved in buried soils and can serve as explicit or implicit traces of past cryogenic environments. They are, respectively, cryoturbation, aggregation and size sorting of soil particles, gleying and peat formation in well drained soils upon impermeable permafrost. Such signatures are used, in terms of the cryotraceological approach, to reconstruct glacial environments during MIS-3 and MIS-2 events of the marine oxygen isotope stratigraphy in different regions.
Cryogenesis, cryotraceology, permafrost signatures, paleosol, Quaternary