Pollen and macrofossil analyses of two radiocarbon dated lake sediment cores in the upper Peace River district were used to investigate the controversial late-glacial geochronology of the ice-free corridor between the Laurentide and Cordilleran ice
masses. The data support occlusion or near occlusion of Laurentide and Cordilleran ice in the Peace River area during the late Wisconsin. The sediment record began around 12,000 yr BP in the ice-damned and enlarged Boune Lake. An initially open, sedge