eld by Boyce and Eyles (1991, p. 790) and could explain the highly weathered clasts and sands present in the drumlins visited in the southern area.“Rock Drumlins are found only in the northern part of the area where the drift is thin. Gravenor (1957) notes that a few erosional drumlins exist near the Oak Ridges Moraine, and he theorizes that these drumlins represent the fringe sections of the moraine, that were drumlinized.” (Otonabee Region Conservation Authority, 1983, p.2-3)In the Dummer Moraine area, “Clasts are usually angular in shape and range in size from pebbles to large boulders. Clasts are mostly Paleozoic in origin and the till matrix is characterized by a high calcite content and calcite/dolomite ratio, reflecting local bedrock sources.” (Barnett and Kelly, 1987, p. 65) They also identified the more rounded clasts (page 65) present in nearby drumlins. These clast characteristics were more common in the northern latitudes of the field study. Eskers were another feature of study during the field study and the idea that the Bridgenorth esker was formed by stagnant ice is supported by the Otonabee Region Conservation Authority (1983, p. 2-4) and is described as being “formed in tunnels at the bottom of the stagnant ice.” The Rice Lake drumlin was subject to some ambiguity as to whether it was actually a drumlin or an esker. Stratification in the north end led some to believe the landform was an esker. This theory can be supported by the Otonabee Region Conservation Authority (1983, p. 2-4):“Where the esker channel narrowed, the material is noticeably coarser, and where it widened, the material is finer. In some locations well stratified deposits of sand, silt and clay exist, denoting the location of a subglacial pond.”Over the course of the three-day field study, notes on the changes of the types of landforms from north to south are concurrent with the literature present...
