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[19] [20] The mines were worked intermittently until 1906. [21] A rare remnant of this local industry is a disused mine engine house chimney in red sandstone, which stands by the A534 at the foot of the northerly hill near Gallantry Bank. The flue of a pumping engine that was used to drain the mine, it dates from the early 19th century and is a ...
Magothy Quartzite Quarry Archeological Site, Pasadena, Maryland, NRHP-listed, Quartzite and sandstone quarries of the Woodland period Seneca Quarry , Seneca, Maryland, NRHP-listed, source of Seneca red sandstone used in two Potomac River canals: the Potowmack Canal (opened in 1802, and officially known as the Great Falls Skirting Canal) on the ...
Jacobsville Sandstone is a red sandstone formation, marked with light-colored streaks and spots, primarily found in northern Upper Michigan, portions of Ontario, and under much of Lake Superior. Desired for its durability and aesthetics, the sandstone was used as an architectural building stone in both Canada and the United States.
Historical photo of the quarry c. 1898 Polished slab of the red sandstone, about 10.7 cm across. Seneca Quarry is a historic site located at Seneca, Montgomery County, Maryland. It is located along the Chesapeake and Ohio Canal on the north bank of the Potomac River, just west of Seneca Creek.
Sandstone, mudstone, shale, limestone and dolomite deposited atop the faulted Precambrian basement rocks. Periodic retreats of sea level during the Paleozoic eroded these rock units, leading to some unconformities in the sedimentary sequence, through the Early Permian.
Over the range of the usage of the Dakota name, the unit is primarily known for its massive beds of sandstone, which commonly shows shades of red, but also gray, yellow, or white. The sand was carried and deposited by rivers or accumulated in dunes or shoreline strands, and later cemented by red iron oxide or white calcite , depending on the ...
Old Red Sandstone, abbreviated ORS, is an assemblage of rocks in the North Atlantic region largely of Devonian age. It extends in the east across Great Britain, Ireland and Norway, and in the west along the eastern seaboard of North America .
The Group unconformably overlies rocks of the Gray Sandstone Group and comprises two different successions either side of the east–west aligned Ritec Fault To the north are (in ascending order) the Red Cliff, Albion Sands/Lindsway Bay, Sandy Haven and Gelliswick Bay formations. To the south are the Freshwater East, Moor Cliffs and Freshwater ...