Rejestr zmian klimatycznych późnego glacjału i holocenu w obrębie torfowiska pod Kotoniem (Beskid Średni, Karpaty zewnętrzne)

Włodzimierz Margielewski

Abstrakt


LATE GLACIAL AND HOLOCENE CLIMATIC CHANGES REGISTERED IN A PEAT BOG AT KOTOŃ MOUNT (BESKID ŚREDNI RANGE, OUTERCARPATHIANS; SOUTHERN POLAND)

Summary
On the southern slope of the pass located between Kotoń Mt. and Pękalówka Mt. (BeskidMakowski Mts), a colluvial vast landslide surrounded by two wedge-shaped niches occurs. At the foot of one of these niches, a longitudinal depression (gutter pipe type) filled up with a fen type peat bog was formed. The maximum depth of these deposits is about 4.7 m. At the bottom there occurs silt with gravel and a thin layer (10 cm) of strongly decomposed peat (dated at 12140 ±70 BP by a 14C method) and covered with clayey silt (4.18–3.85 m). This is overlain by moss fen and sedge-moss fen type peat (3.85–1.2 m) covered, in turn, by a thick mineral layer (1.2–0.2 m) composed of clay and silty clay. The profile ends with a thin level of sedge peat. Mineral cover was deposited in some stages; the first was ascribed to a wet period of the Boreal–Atlantic phase boundary, whereas the main was assigned to the Early Subboreal, and the Subatlantic phase. The radiocarbon datings, confirmed by a pollen analysis, indicate that the landslide depression formed during the BøllingInterstadial. The peat accumulation started with the Older Dryas and the AllerødInterstadial. The depositionof mineral (non-organic) layers that underlie the peat bog was linked to the wet phases recorded in the Early Atlantic, Early Subboreal, and Early Subatlantic.

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