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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.
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Several different types of bentonite can be found; however, potassium bentonite is the main one associated with the Deicke and Millbrig eruptions. The Deicke and Millbrig K-bentonite layers can be found from Alabama to New York to Minnesota. These K-bentonite layers are up to a meter thick in some locations. [8] Such thickness is unique.
Pages in category "Bentonite" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes. ...
There are 7–15 layers of ash depending on the location covering ~30 million years. These numerous layer are broken down into 4 clusters. The Bald Hill K-bentonites are located in the Kalkberg Formation or New Scotland Formation were deposited 417.6 million years ago.
As of 2017, Azerbaijan produced a range of metals and industrial minerals, including aluminum, bentonite, copper, gold, iodine, limestone, silver and steel. [1]Azerbaijan's importance as a world mineral producer, however, was based on its petroleum extracting industry.
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