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Tataga-Matau Fortified Quarry Complex (AS-34-10), near the village of Leone on Tutuila in American Samoa, NRHP-listed, "a complex consisting of a series of basalt quarries and structures that archaeologists have interpreted as having a military defensive purpose. The site has been known since at least 1927, and was first formally surveyed in ...
The 1,200-foot (370 m)-wide Newark Earthworks Great Circle (located in Heath, OH) is one of the largest circular earthworks in the Americas, at least in construction effort. A 5-foot (1.5 m) deep moat is encompassed by walls that are 8 feet (2.4 m) high; at the entrance, the dimensions are even more grand.
Basalt fiber is made from a single material, crushed basalt, from a carefully chosen quarry source. [1] Basalt of high acidity (over 46% silica content [2]) and low iron content is considered desirable for fiber production. [3] Unlike with other composites, such as glass fiber, essentially no materials are added during its production.
In 1985, the Kaufmans sold the 2,000-acre (8.1 km 2) quarry to investors who filled in and developed the quarry for residential use, including Marble Cliff Commons [6] [2] [3] apartments and Marble Cliff Crossing, a 100 single-family and 60 double-family subdivision built between 1998 and 2003. [7]
Over 70 glass companies operated in northwest Ohio between 1880 and the early 20th century. [24] However, Northwest Ohio’s gas boom lasted less than five years. By 1890, the region was experiencing difficulty with its gas supply, and many manufacturers were already shutting down, using alternative fuels, or considering relocating.
Basalt columns seen on Porto Santo Island, Portugal. Columnar jointing of volcanic rocks exists in many places on Earth. Perhaps the most famous basalt lava flow in the world is the Giant's Causeway in Northern Ireland, in which the vertical joints form polygonal columns and give the impression of having been artificially constructed.
It was founded as Bucyrus Foundry and Manufacturing Company in Bucyrus, Ohio, in 1880. Bucyrus moved its headquarters to South Milwaukee, Wisconsin , in 1893. In 1927, Bucyrus merged with the Erie Steam Shovel Company to form Bucyrus-Erie.
In 2009, Severstal idled most of the former Wheeling-Pitt operations, including Steubenville South and the manufacturing operations in Wheeling. The move laid off over 3,100 workers in West Virginia and Ohio. [10] In 2011, Severstal sold the former Wheeling-Pitt steelmaking operations to RG Steel, a subsidiary of Renco Group. [11]