Dendrochronologically dated pine stumps document phase-wise bog expansion at a northwest German site between ca. 6700 and ca. 3400 BC

摘要: Abstract. The investigated northwest German mire site at “Totes Moor” is densely covered with subfossil pine stumps (Pinus sylvestris L.) from the fen–bog transition. This facilitates spatio-temporal reconstruction of development, which based on 212 in situ tree stumps in case study presented here. Six dendrochronologically dated site chronologies together cover 2345 years between 6703 and 3403 BC. gaps in between are 6 to 550 years long. Additionally, a floating chronology of 309 years, containing 30 trees, was radiocarbon-dated beginning the 7th millennium cal BC. Peat-stratigraphical survey carried out additionally, elevations a.s.l. were determined several locations. Tree dying-off phases, indicate water level rise site, mostly in context local transition, evident for ca. 6600–6450, ca. 6350–5750, ca. 5300–4900, ca. 4700–4550, ca. 3900–3850, ca. 3700–3600, ca. 3500–3450 ca. 3400 BC. spatial distribution of the trees illustrates phase-wise expansion raised bog over fen peat site. documented bog pulses likely correspond climatic wet sifts.