Figure 16.
Sample GF-60 was collected from this outcrop at the top of Plummers Island. The outcrop is smooth and includes a remnant of a pothole suggesting that erosion has been minimal.
U.S. Department of the Interior
,
U.S. Geological Survey
URL: http:// pubs.usgs.gov /circ/2004/1264/html/trip6/fig16.html
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Last modified: 12:08:32 Fri 06 Apr 2007
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