U.S. Geological Survey: Science for a Changing World - USGS visual identifier and link to main Web site at http://www.usgs.gov/

Photographs of sample sites upstream of Great Falls at Stop 1 (Day 2). For a more detailed explanation, contact Paul Bierman at pbierman@zoo.uvm.edu.
Figure 17. Sample sites upstream of Great Falls at Stop 1 (Day 2). A, Samples GF-53 and GF-54 were collected from fluvially rounded and polished outcrops along the Virginia side of the river upstream of the aqueduct dam. B, Samples GF-55 and GF-56 were collected as the two highest samples of a four-sample transect downstream of the aqueduct dam.

U.S. Department of the Interior, U.S. Geological Survey
URL: https:// pubs.usgs.gov /circ/2004/1264/html/trip6/fig17.html
For more information, contact Paul Bierman
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