Figure 2. Portion of a surficial geology map (left) and a surficial materials map (right). Note how the data observations on the materials map are clustered around the eastern border of the Pmdeg unit. As a result, the Pmdeg-Pmn boundary is the most accurately located boundary on this part of the map. Other boundaries were interpreted from topography and air photos.

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Last updated on October 6, 2005

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