McGavock's Dolomite Quarry. Shows character of weathered material at top and general resemblance to Platteville limestone beds. Near view of bank with steam shovel in operation. Shows gravel at top with sand below. Rock County. Beloit, Wisconsin. No date. Courtesy U.S. Geological Survey. The USGS home page is http://www.usgs.gov.
This photograph is by carnkie and was uploaded December 26th 2009. © carnkie please do not copy or distribute without prior express permission.
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