Search results
Results From The WOW.Com Content Network
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.
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.
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.
One cluster called the Tioga Middle Coarse Zone (MCZ) is located in the Onondaga Group deposited 391.4 million years ago. Finally Tioga A-G K-bentonites are located in the Onodaga Group and the Union Springs Member of the Marcellus Formation deposited 390.0 million years ago. [2] The volcanic ash was deposited in sea water. [1]
A sample of fuller's earth in its raw state from Pakistan. Fuller's earth is a term for various clays used as an absorbent, filter, or bleaching agent. Products labeled fuller's earth typically consist of palygorskite (also known as attapulgite) or bentonite. [1]
Important deposits include the Askana bentonite clay deposit in Ozurgeti, the Kisatibi diatomite deposit in the Akhaltsikhe District, the Kvaisa zinc deposit in the Java district, the Lukhumi arsenic deposit in the Ambrolauri district, and the Madneuli polymetallic (barite, copper, lead-zinc, pyrite, silver, sulfur, gold bearing quartzites ...
Mowry Shale exposed in a road cut, Uintah Basin, Utah. The Mowry Shale or Fish-scale Beds because of the abundance of fish scales, is a dark-gray, siliceous shale that weathers silver gray; it is 10-70 m thick. 40Ar/39Ar of sanidine from a bentonite yielded an age of 97.17 +/-0.69 Ma, [3] thus is Cenomanian in age.
Many clay deposits for drilling, brick and ceramics are exploited. The limestone deposit with 8.3 thousand m 3 is determined which is suitable for the production of flysch and carbide in the territory of Siyazan region. The volcanic ash-tuff is a zeolite raw material and the belonged field (Aydagh) is located in 7 km north-western of Tovuz.