Abstract
Paleosols of Trubchevsk district of the Bryansk region (Russia) lie in landscape with its own characteristic micro-relief, called Trubchevsk Opolye. The radiocarbon data have obtained for two interstadial soils: 16500 ± 230 Ki-17 414, 12930 ± 170 Ki-17 413 years ago. The ratio δ13Corg for underlying sandy pedosediments varies in range -26.5-27.2 %o characterizes relatively humid climate. The most lightweight carbon isotope composition (δ13C = -28.4-29.5 %o) measured for the Holocene second humus horizon, discovered in microdepressions of Trubchevsk opolye and dating (in its upper part) 2180 ± 60 Ki-17 415 BP, 1650±60 Ki-18775. It is characterized by a high content of phosphorus, including its strong accumulation of organic compounds (635.8 mg/kg P2O5).
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