THE FLUVIAL REWORKING OF LATE PLEISTOCENE DRIFT, SQUAMISH RIVER DRAINAGE-BASIN, SOUTHWESTERN BRITISH-COLUMBIA

Reworked glacial sediment(s) (RGS) represents the component of paragla cial sedimentation derived from the fluvial reworking of late Pleistoc ene glacial deposits in the postglacial landscape. In Squamish River d rainage basin, southwestern British Columbia, the primary source of th e RGS transferred to Squamish Valley is fluvial incision into valley-f ill deposits in the five major tributary valleys of the watershed. The total volume of RGS transferred to Squamish Valley is 415 x 10(6) m3. The volume of RGS from the individual tributary valleys range from 6 to 130 x 10(6) m3 with valley morphology and late Quaternary history b eing the important controls upon the specific amount. Geomorphic evide nce indicates that the bulk of the RGS was contributed to Squamish Val ley thousands of years ago. The transfer of RGS continues at a very lo w residual rate in the contemporary landscape. RGS appear to represent a minor portion of the Squamish valley-fill and a small component of the post-glacial sediments stored in Squamish Valley.