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Beaver Dam, Maryland, a now "flooded marble quarry in Cockeysville, Maryland, that has been used as a swimming location since the 1930s. Source of dolomitic marble known specifically as Cockeysville Marble for the Washington Monument in Washington, D.C. and many other purposes in the eastern U.S. Greenspring Quarry, now a lake, Pikesville, Maryland
Since it is found in red and orange this stone could also be referred to as carnelian. [1] It is only found in Maryland and its colors reflect the Maryland State Flag . The Patuxent River stone became the state gem effective October 1, 2004 through the passage of Chapter 272, Acts of 2004; Code State Government Article, sec. 13-319.
A 2010 effort led by State Senator Gloria J. Romero, a Democrat from Los Angeles, sought to remove serpentine from its perch as the state's official stone. Organizations such as the Asbestos Disease Awareness Organization have supported the move as the olive green rock is a source of chrysotile , a form of asbestos that can cause mesothelioma ...
The quarry was the source of stone for two Potomac River canals: the Patowmack Canal (opened in 1802, and officially known as the Great Falls Skirting Canal) on the Virginia side of Great Falls; and the C&O Canal, having supplied red sandstone for the latter for locks 9, 11, 15 - 27, and 30, the accompanying lock houses, and Aqueduct No. 1 ...
In addition to use in buildings, gneiss from Jones Falls and Gwynn Falls quarries was used for foundations, roads, and curbstones in Baltimore. Some quarrymen referred to the gneiss as "blue stone" due to the blue-gray color of its fresh surface. The last building stone quarry in Baltimore closed in 1958. [6]
The Cockeysville Marble has been quarried in Beaver Dam within Cockeysville and other locations in Maryland. A historical account is given in Maryland Geological Survey Volume Two. [3] The Cockeysville was also mined for crushed stone at what is now called Quarry Lake. [4] It was known as the McMahon Quarry in the 1940s.
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