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

Figure 5. Pebbles and cobbles of metamorphic rock in basal conglomeratic facies of the Reston Member of the Manassas Sandstone at Stop 5.

U.S. Department of the Interior, U.S. Geological Survey
URL: http:// pubs.usgs.gov /circ/2004/1264/html/trip1/fig5.html
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