- siliceous rocks
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кислые породы
English-Russian dictionary of geology. 2011.
siliceous rocks
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Siliceous rock — Siliceous rocks are sedimentary rocks that have silica (SiO2) as the principal constituent. The most common siliceous rock is Chert other types include Diatomite. They commonly form from silica secreting organisms such as radiolarians, diatoms,… … Wikipedia
siliceous rock — Any of a group of sedimentary rocks that consist largely or almost entirely of silicon dioxide (SiO2), either as quartz or as chert, the most common siliceous rock. It occurs in beds and in nodules. Bedded cherts may be an original organic or… … Universalium
siliceous — silica ► NOUN ▪ silicon dioxide, a hard, unreactive, colourless compound which occurs as quartz and in sandstone and many other rocks. DERIVATIVES siliceous adjective. ORIGIN from Latin silex flint , on the pattern of words such as alumina … English terms dictionary
Case hardening of rocks — Case hardening is a weathering phenomenon of rock surface induratoin. It is observed commonly in: felsic alkaline rocks, such as nepheline syenite, phonolite and trachyte; pyroclastic rocks, as pyroclastic flow deposit, fine air fall deposits and … Wikipedia
Hartcliff Rocks Quarry — Infobox SSSI name=Hartcliff Rocks Quarry aos=Avon interest=Geological gridref=ST534662 area=1.6 hectare (3.9 acre) notifydate=1991 http://www.natureonthemap.org.uk/map.aspx? ] Hartcliff Rocks Quarry (gbmapping|ST534662) is a 1.6 hectare (3.9… … 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
silica mineral — Any of the forms of silicon dioxide (SiO2), including quartz, tridymite, cristobalite, coesite, stishovite, melanophlogite, lechatelierite, and chalcedony. Various kinds of silica minerals have been produced synthetically. * * * Introduction… … Universalium
Chert — For the Spanish municipality, see Xert. Chert Chert ( / … Wikipedia
Monterey Formation — Outcrop of Monterey Formation, Gaviota State Park, California. The Monterey Formation is an extensive Miocene oil rich geological sedimentary formation in California, with massive outcroppings of the formation in areas of the California Coast… … Wikipedia
Zussmanite — K(Fe++,Mg,Mn)13 [AlSi17O42] (OH)14 is a hydrated iron rich silicate which was found in 1960 by Stuart Olof Agrell, in the Laytonville quarry, Mendocino County, California. Zussmanite is named in honor of Jack Zussman, Head of the University of… … Wikipedia
Geochemistry — The field of geochemistry involves study of the chemical composition of the Earth and other planets, chemical processes and reactions that govern the composition of rocks and soils, and the cycles of matter and energy that transport the Earth s… … Wikipedia
