Disturbances of the holocene lake-bog sediment succession as revealed by pollen record from wietrzychowice (south eastern kujawy, central poland)

Re sults of geo log i cal and pol len in ves ti ga tions of the lake-bog sed i ments from the sec tion Wietrzychowice W5, located nearby the Neo lithic Fun nel Beaker Cul ture (FBC) mega liths, are pre sented. The pol len data re veal that sed imen ta tion at Wietrzychowice has be gun at the be gin ning of the Ho lo cene (Preboreal). Pol len anal y sis was used to determine stratigraphy with regard to sediment characteristics. The pollen spectrum was divided into 8 LPAZes (1-7Xa, 7Xb) which were also, where pos si ble, stratigraphically clas si fied. Ra dio car bon dat ing of 6 730 ± 90 BP (5 730–5 480 BC, MKL-702) at depth of 1.20 m con firmed the pol len anal y sis age es ti ma tion. Five set tle ment ep i sodes were found in or ganic sed i ments in the up per part of the W5 core. The first was pre sum ably dur ing the Preboreal, the sec ond in the early At lan tic, the third in the late At lan tic (prob a bly Neo lithic FBC), the fourth in the early Mid dle Ages and the last one in the late Mid dle Ages. The pol len anal y sis was use ful to point ir reg u lar i ties in sed i ment suc ces sion. Such a sit u a - tion made palaeoenvironmental in ter pre ta tion dif fi cult, but fur ther re search is still needed to en able an ac cu rate re construc tion.