Glacial Transformation EarthCache
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Please email the answer to the following questions to log this cache: --How many drumlins can you spot from this location? -Take an elevation reading from the parking lot and an elevation reading from the top of the drumlin to get the height of the drumlin itself. What is that height? Optional: Take a photograph of your favorite view from the top of the drumlin and put this in your log when you log your visit.
You are standing on top of a drumlin. This drumlin is a product of two geomorphic actions: glacial activity, and continuous water modification by the pro-glacial lake, Lake Iroquois. A remnant of this is Oak Lake, which is located about two miles to your north. This particular drumlin you are on is part of a feature known as Oak Lake Island. Oak Lake Island is a series of large drumlins that formed an island in Lake Iroquois. Drumlins are whaleback-shaped hills. Formed approximately 13,000 years ago in the last ice age during the advance of the Wisconsin Glaciation, they are prominent features in this part of southern Ontario. The south side of the drumlin was at one time part of the shore cliffs of Lake Iroquois. The north side of the drumlin is sandy and contains beach deposits typical of large water bodies. It is known that the orientation and shape of drumlins is an indicator of glacier flow. This particular drumlin indicates that the ice sheet which formed travelled from the north on a bearing of 37 degrees north east. At the top of the drumlin, you are standing on one of the highest points of land in the area (230m above sea level) and provides an excellent point from which to view the surrounding countryside including part of the Trent River valley. Imagine, if you were standing here 20,000 years ago, you would have 2 km of ice on top of your head!
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