We distinguished major stages of the last glaciation (Bolling, Older D
ryas, Allerod, Younger Dryas) and the Holocene by radiocarbon dating a
nd paleobotanical analyses. Our paleobotanical investigation of peatla
nds is well correlated with independent C-14 data. We establish that t
he Atlantic and Subboreal stages of the Holocene have three divisions,
and that the Subatlantic has two.