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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.
List of countries by bentonite production; List of countries by bismuth production; C. List of countries by chromium production; List of countries by coal production;
List of countries by bentonite production; A. Ayilo; D. Deicke and Millbrig bentonite layers; S. Smectite This page was last edited on 1 April 2018, at 17:33 (UTC ...
Bentonite mines in Ethiopia (1 P) R. Bentonite mines in Romania (4 P) Bentonite mines in Russia (1 P) This page was last edited on 1 August 2020, at 08:25 (UTC). ...
Map of countries with proven oil reserves - according to US EIA (start of 2017) Trends in proven oil reserves in top five countries, 1980–2013 (data from US Energy Information Administration) A map of world oil reserves according to OPEC, January 2014
List of countries by bauxite production: Bismuth [8] China Vietnam: List of countries by bismuth production: Copper [9] Chile Peru: List of countries by copper production: Chromium [10] South Africa Turkey: List of countries by chromium production: Gold [11] China Australia: List of countries by gold production: Iron ore [12] Australia China
This is a list of countries by pig iron production. Pig Iron production (million metric tons) Rank Country 1980 2013 2015 World: 506: 1,168: 1,180 1: China: 38: 709: ...
This is a list of lists of countries and territories by various criteria. A country or territory is a geographical area, either in the sense of nation (a cultural entity) or state (a political entity).