New radiocarbon datings of the Late Glacial and Holocene organic deposits of the Janoszyce furrow, Dobrzyń Lakeland

Abstract

Organic deposits of Janoszyce furrow, Dobrzyń Lakeland, are represented by two peat layers separated and underlied by lacustrine chalk. The radiocarbon datings have shown that older peat layer originated in the Allerd, and the younger - in the Pre-Boreal. The formation of organic layers was accompanied by several flows of loamy and sandy deposits, resulting from the climatic changes and the melting of dead ice block, the intensity of which was changing in time. Lacustrine chalk and black clay, directly underlying the older, AllerÝd peat layer, are dated at the older Dryas and BÝlling, restpectively.