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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.
Cathedral Gorge State Park is a public recreation area and geologic preserve featuring a dramatic landscape of eroded soft bentonite clay covering almost 1,800 acres (730 ha) in Lincoln County, Nevada. The state park is located along U.S. Route 93 at the west end of State Route 319, two miles (3.2 km) northwest of the town of Panaca. [4]
Geosynthetic clay liners (GCLs) are factory manufactured hydraulic barriers consisting of a layer of bentonite or other very low-permeability material supported by geotextiles and/or geomembranes, mechanically held together by needling, stitching, or chemical adhesives. Due to environmental laws, any seepage from landfills must be collected and ...
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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.
The presence of bentonite clay further increases erodibility, as can rejuvenation of the drainage system from regional uplift, as occurred at Badlands National Park. [ 4 ] In addition to surface erosion, badlands sometimes have well-developed piping , which is a system of pipes, joints, caverns , and other connected void spaces in the ...
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