| During the decay of the Cordilleran Ice Sheet (CIS), ∼10 to 12 ka 14C BP, numerous ribbon lakes developed within the moderately deep valleys of the Interior Plateau of British Columbia. A rich geomorphic and sedimentary record of these lakes remains. This study integrates geomorphology, sedimentology, aerial photographs, differential global positioning system data, ground penetrating radar data and a digital elevation model (DEM) in a geographic information system (GIS) to (i) investigate, survey and correlate paleolake levels, (ii) reconstruct paleolake geography, evolution and environment, and (iii) reconstruct glacio-isostatic rebound.; The sedimentary record of these lakes reflects the adjustments of a landscape undergoing deglaciation. Seventeen glaciolacustrine lithofacies were identified and record deltas, subaqueous fans, high rates of sedimentation, numerous hyperpycnal flows and a diversity of sediment dispersal and deposition processes. High sedimentation rates and numerous hyperpycnal flows suggest that ribbon lakes likely received their meltwater and sediment supply from ice remnant on the plateau. (Abstract shortened by UMI.)... |
