being made during a north-south transect of the Peterborough drumlin field. The first stop was made at an esker (NTS grid reference: 096 171) near the town of Bridgenorth, Ontario. The esker is deposited sediments from the meltwater of stagnant ice. The orientation of the esker is parallel to the direction of meltwater flow. It is comprised of well-rounded limestone material (light to dark grey) with smaller amounts of Shield material (white, red, and pink). The abundance of limestone infers that the material was not transported a great distance because limestone is prominent in the area. Stratification of the sediments is evident due to excavation on and around the esker. A layer near the top of the esker contains large sediments relative to the rest of the esker that is almost uniformly sand and gravel. The range in size of the materials deposited can be explained by a change in river velocity over time. The higher the velocity of a stream the larger the materials it can transport. Certain layers of sand have become slightly cemented by calcium carbonate. The next stop was made at Mark S. Burnham Park (NTS grid reference: 175 085). The majority of the park is located on the southern half of a drumlin. This drumlin is unique because it is relatively untouched by humans, perhaps due to the establishment of the park. A traverse of the marked path revealed many smaller clasts that appear to be sedimentary rock. A sample with two extremely flat faces on which sand particles can be removed by friction led to the conclusion of sedimentary rock. Less frequent and larger clasts are mainly granite igneous and metamorphic rock. They are identifiable as such because of distinct metamorphic layers visible by colour ranging from pink to white to grey. A large (38-inch) limestone rock, characterized by irregular pits and cracks, is another clue to the composition of the drumlin. Another sample was determined to be limestone ...
