Figure 2. glacial erratic boulder

Figure 2. Example of a glacial erratic boulder sampled for surface exposure dating in Wisconsin. This boulder is fairly well-rounded from its transport in the ice sheet. These erratics can have a composition different from the local bedrock, suggesting that they may have traveled a great distance.

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Uploaded: Sep19 11

Last Modified: 2011-11-11 12:20:18
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David Ullman, University of Wisconsin-Madison
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