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  2. Boundary markers of the original District of Columbia

    en.wikipedia.org/wiki/Boundary_Markers_of_the...

    Map of the boundary stones. The District of Columbia (initially, the Territory of Columbia) was originally specified to be a square 100 square miles (260 km 2) in area, with the axes between the corners of the square running north-south and east-west, The square had its southern corner at the southern tip of Jones Point in Alexandria, Virginia, at the confluence of the Potomac River and ...

  3. Onondaga Limestone - Wikipedia

    en.wikipedia.org/wiki/Onondaga_Limestone

    Onondaga limestone [8] [12] was quarried as dimension stone for construction of limestone buildings. The following buildings contain structural Onondaga limestone: Brooklyn Bridge (cable anchorages and towers below the water line) in Brooklyn, New York [13] Genesee County Courthouse in Batavia, New York; Gridley Building of Syracuse, New York

  4. Nelsonite - Wikipedia

    en.wikipedia.org/wiki/Nelsonite

    It was named for Nelson County, Virginia, and is also found in that state's Amherst and Roanoke counties. In 2016, the Virginia legislature designated it as the official State Rock of Virginia . [ 4 ]

  5. Fredericksburg and Spotsylvania National Military Park

    en.wikipedia.org/wiki/Fredericksburg_and...

    Historic American Buildings Survey (HABS) No. VA-339, "Chatham, State Routes 3 & 607 vicinity, Falmouth, Stafford County, VA", 58 photos, 9 color transparencies, 4 data pages, 4 photo caption pages Historic American Buildings Survey (HABS) No. VA-339-A, " Chatham, Garden Statuary & Grounds, .2 mile northeast of intersection of State Routes 218 ...

  6. Fairfax Stone Historical Monument State Park - Wikipedia

    en.wikipedia.org/wiki/Fairfax_Stone_Historical...

    The stone was still intact in 1859 when one Lieutenant Melcher found it again and reran the "Fairfax Line" on behalf of the two states. The Stone was gone by 1909, however, having been carried away by vandals. [10] There have been six Fairfax Stones, each one replacing the last owing to weathering or vandalism. The current stone is a six-ton ...

  7. List of National Historic Landmarks in Virginia - Wikipedia

    en.wikipedia.org/wiki/List_of_National_Historic...

    A boundary stone associated with Benjamin Banneker, (1731–1806), an African American surveyor, mathematician and astronomer who assisted Andrew Ellicott during the first two months of Ellicott's 1791–1792 survey of the boundaries of the original District of Columbia. [3] 7: Barracks, Virginia Military Institute: Barracks, Virginia Military ...

  8. Grave Creek Stone - Wikipedia

    en.wikipedia.org/wiki/Grave_Creek_Stone

    The Grave Creek Stone is a small sandstone disk inscribed on one side with some twenty-five characters, purportedly discovered in 1838 at Grave Creek Mound in Moundsville, West Virginia. If genuine, it could provide evidence of Pre-Columbian writing, but the discovery that the characters can be found in a 1752 book suggests that it is probably ...

  9. Aquia Creek sandstone - Wikipedia

    en.wikipedia.org/wiki/Aquia_Creek_sandstone

    Quarried at Aquia Creek in Stafford County, Virginia, the stone was valuable for its ease of shaping and the quarry's proximity to the tidewater portion of the Potomac River, 45 miles (72 km) south of Washington. The sandstone was the principal material used in such significant buildings as the White House and the early stages of the U.S ...