Glacial-fluvial sediments are deposited by glacial meltwater in a floodplain environment. These deposits consist of coarse to medium grained sand and gravel, poorly to well sorted and bedded, with numerous cobbles, boulders, and lenses of till. They were deposited in ice contact or near-ice positions by glacial meltwater during the last phase of glaciation, when glaciers were stagnant or retreating.