The study area encompasses 1100 km('2) in northwestern Connecticut and adjacent Massachusetts. It contains three lithologic-topographic belts: a crystalline upland, a marble lowland, and a phyllitic upland; each having two tills, the youngest of Woodfordian age. The youngest or "upper" till has ablation, resedimented (diamicton), meltout and basal facies. The older or "lower" till has oxidized and unoxidized zones. Tills and till facies of each belt can be discriminated by grain size and clast weathering characteristics. Abundance isopleths of upper till heavy minerals and exotic clasts indicate strong topographic control of basal ice movement and possible glaciotectonic thrusting. Field relationships and upper till compositional changes in the crystalline belt suggest this sequence: (1) erosion of the bed, (2) lodgment of till, (3) erosion of the bed and reincorporation of previously deposited till, and (4) ice stagnation. Entrained subglacial material locally was frozen during (3).

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