LATE PLEISTOCENE STRATIGRAPHY AND CHRONOLOGY OF LOWER SEYMOUR VALLEY,SOUTHWESTERN BRITISH-COLUMBIA

A detailed study of the surficial sedinients and landforms in the lowe r Seymour Valley has provided a complete record of the last glacial cy cle. This study shows that the valley was slowly aggrading before 29 k a and rapidly aggrading after 29 ka. Ice of the Fraser Glaciation reac hed the mouth of the valley about 22 ka and retreated before 18.5 ka. The valley was subsequently vegetated. Ice once again advanced and occ upied Seymour Valley after about 17 ka Before 11.5 ka ice in Seymour V alley retreated a final time, and the valley once again became vegetat ed.