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Bentonite usually forms from weathering of volcanic ash, most often in the presence of water. However, the term bentonite, as well as a similar clay called tonstein, have been used for clay beds of uncertain origin. For industrial purposes, two main classes of bentonite exist: sodium bentonite and calcium bentonite.
Bentonite layers from an ancient deposit of weathered volcanic ash tuff in Wyoming Gray shale and bentonites (Benton Shale; Colorado Springs, Colorado). Bentonite (/ ˈ b ɛ n t ə n aɪ t / BEN-tə-nyte) [1] [2] is an absorbent swelling clay consisting mostly of montmorillonite (a type of smectite) which can either be Na-montmorillonite or Ca-montmorillonite.
The Tioga Bentonites are a series of ash bed layers occurring in three Sedimentary basins in the eastern and midwestern United States. The primary basin they are found in is the Appalachian Basin, as well as the Illinois Basin and the Michigan Basin.
Underground room and pillar mining began in 1936. Leased storage began in 1986. Used by the U.S. Department of Defense for storage of 10,000,000 MRE meals, by Bridgestone for storage of 400,000 tires, and by Controlled Pharming Ventures for growing tomatoes and corn. Indiana is the Limestone Capital of the world.
Industrial resources (minerals) are geological materials that are mined for their commercial value, which are not fuel (fuel minerals or mineral fuels) and are not sources of metals (metallic minerals) but are used in the industries based on their physical and/or chemical properties. [1]
Mine: State: Coordinates: Town: Owner: Dates: Comments: Pyne Mine: Alabama 33°22′33.18″N 86°55′21.65″W Lacey's Chapel: Woodward Iron Company: 1918–1971 One of only two shaft mines dug in the Birmingham District, and the last ore mine to operate in the region, closing in 1971. Sloss Mines: Alabama 33.39816°N 86.93276°W Red Mountain
Bentonite mines (1 C) Pages in category "Bentonite" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes. ...
Indiana limestone is a more common term for Salem Limestone, a geological formation primarily quarried in south central Indiana, USA, between the cities of Bloomington and Bedford. It has been called the best quarried limestone in the United States. Indiana limestone, like all limestone, is a rock primarily formed of calcium carbonate.