Drift that is deposited directly from glacial ice and therefore not sorted. Also called till. See also glacial drift.
glacial till The mass of rocks and finely ground material carried by a glacier, then deposited when the ice melted. The process creates an unstratified material of varying composition.
accumulations of unsorted, unstratified mixtures of clay, silt, sand, gravel, and boulders; the usual composition of a moraine.