Chemical weathering of aluminosilicate rocks under warm, humid conditions leaches away most soluble cations (Si, Ca, Na, K, Mg) leaving behind an aluminum-hydroxide-rich residual deposit known as bauxite -- the primary ore of aluminum and a classic secondary (weathering-formed) mineral/rock.
Among the listed minerals, bauxite is a secondary weathering product, forming through intense chemical weathering (laterization) of aluminosilicate source rocks, during which silica and other...
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