montmorillonite group of clays

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• Montmorillonite — A sample of montmorillonite (unknown scale) General Category smectite, phyllosilicate …   Wikipedia

• montmorillonite — montmorillonitic /mont meuh ril euh nit ik/, adj. /mont meuh ril euh nuyt /, n. any of a group of clay minerals characterized by the ability to expand when they absorb large quantities of water. Also called smectite. [1850 55; named after… …   Universalium

• clay mineral — any of a group of hydrous aluminum silicate minerals, as kaolinite, illite, and montmorillonite, that constitute the major portion of most clays. [1945 50] * * * Any of a group of important hydrous aluminum silicates with a layered structure and… …   Universalium

• Clay minerals — Oxford Clay (Jurassic) exposed near Weymouth, England. Clay minerals are hydrous aluminium phyllosilicates, sometimes with variable amounts of iron, magnesium, alkali metals, alkaline earths, and other cations. Clays have structures similar to… …   Wikipedia

• Nontronite — from Slovakia General Category Smectite Phyllosilicate Che …   Wikipedia

• sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium

• Clay — For other uses, see Clay (disambiguation). The Gay Head cliffs in Martha s Vineyard consist almost entirely of clay. Clay is a general term including many combinations of one or more clay minerals with traces of metal oxides and organic… …   Wikipedia

• Dickite — General Category Phyllosilicate Chemical formula Al2Si2O5(OH)4 Strunz classification 09.ED.05 Dana classification …   Wikipedia

• Palygorskite — A sample of Palygorskite General Category Phyllosilicate Chemical formula …   Wikipedia

• Abiogenesis — Primordial soup redirects here. For the board game, see Primordial Soup (board game). Origin of life redirects here. For views on the origins of life outside the natural sciences, see Creation myth. Pre Cambrian stromatolites in the Siyeh… …   Wikipedia

• Evolutionary history of life — Although evidence of early life is scarce and often difficult to interpret, it appears that life appeared on Earth relatively soon (on the geologic time scale) after the planet had cooled enough for liquid water to be present. The dominant theory …   Wikipedia