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Quartzite is a very hard rock composed predominantly of an interlocking mosaic of quartz crystals. The grainy, sandpaper-like surface is glassy in appearance. Minor amounts of former cementing materials, iron oxide, silica, carbonate and clay, often migrate during recrystallization, causing streaks and lenses to form within the quartzite. [1 ...
Sioux Quartzite at Falls Park, Sioux Falls, South Dakota Cross-bedding in the Sioux Quartzite, Blue Mounds State Park, Minnesota, United States.. The Sioux Quartzite is a Proterozoic quartzite that is found in the region around the intersection of Minnesota, South Dakota, and Iowa, and correlates with other rock units throughout the upper midwestern and southwestern United States.
The unit is a thick sequence of massive quartzite beds, white to reddish or tan in color, 2 to 7 feet (0.6 to 2 m) thick. There are also scattered beds of sericite schist that become more numerous in the uppermost part of the formation, where the quartzite beds thin to 1 to 2 feet (0.3 to 0.6 m) in thickness and the beds are reddened by hematite.
1883. The Eureka Quartzite is an extensive Paleozoic marine sandstone deposit in western North America that is notable for its great extent, extreme purity, consistently fine grain size of Quartzite, and its tendency to form conspicuous white cliffs visible from afar. The Eureka is commonly underlain and overlain by contrasting slope-forming ...
A fluted point made from Hixton quartzite. The earliest known humans at Silver Mound were Paleo-Indians, who entered the area about 9550 BC. [4] This is not long after the last glacier began retreating a short distance to the north, when the climate remained cool and mammoths and mastodons still roamed the area. To hunt them, the Paleo-Indians ...
The Baraboo Range is a mountain range in Columbia County and Sauk County, Wisconsin. Geologically, it is a syncline fold consisting of highly eroded Precambrian metamorphic rock. It is about 25 miles (40 km) long and varies from 5 to 10 miles (16 km) in width. The Wisconsin River, previously traveling in a north to south direction, turns to the ...
04-58010. GNIS feature ID. 0009866 [1] Website. Town of Quartzsite. Quartzsite is a town in La Paz County, Arizona, United States. According to the 2020 census, the population was 2,413. [3] Interstate 10 runs directly through Quartzsite which is at the intersection of U.S. Route 95 and Arizona State Route 95 with I-10.
The Cambrian Hardyston Formation or Hardyston Quartzite is a mapped bedrock unit in Pennsylvania and New Jersey. It was originally described by Wolff and Brooks in 1898, [1] where two outcrops in Hardyston Township, Sussex County, New Jersey, were described. They originally named it the Hardistonville quartzite, but the name was later changed ...