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. The investigated northwest German mire site at “TotesMoor” is densely covered with subfossil pine stumps (Pinus sylvestris L.)from the fen–bog transition. This facilitates the spatio-temporalreconstruction of mire development, which is based on 212 in situ tree stumpsin the case study presented here. Six dendrochronologically dated sitechronologies together cover 2345 years between 6703 and 3403 BC. The gaps inbetween are 6 to 550 years long. Additionally, a floating chronology of309 years, containing 30 trees, was radiocarbon-dated to the beginning of the7th millennium cal BC. Peat-stratigraphical survey was carried outadditionally, and elevations a.s.l. were determined at several locations. Tree dying-off phases, which indicate water level rise at the site, mostly incontext of the local fen–bog transition, are evident for ca. 6600–6450,ca. 6350–5750, ca. 5300–4900, ca. 4700–4550, ca. 3900–3850,ca. 3700–3600, ca. 3500–3450 and ca. 3400 BC. The spatial distribution ofthe dated in situ trees illustrates the phase-wise expansion of raised bogover fen peat at the site. The documented bog expansion pulses likelycorrespond to climatic wet sifts.

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