detritus mineral
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Detritus (geology) — Detritus (English pronunciation: /dɪˈtraɪtəs/, adjective detrital, pronounced /dɪˈtraɪtəl/) is a geological term used to describe particles of rock derived from pre existing rock through processes of weathering and erosion. Detrital… … Wikipedia
detritus — [ geology ] A collective term for rock and mineral fragments occurring in sediments, that are detached or removed by mechanical means (e.g., disintegration, abrasion) and derived from pre existing rocks and moved from their place of origin … Glossary of landform and geologic terms
Heavy mineral sands ore deposits — Heavy minerals (dark) in a quartz beach sand (Chennai, India). Heavy mineral sands are a class of ore deposit which is an important source of zirconium, titanium, thorium, tungsten, rare earth elements, the industrial minerals diamond … Wikipedia
Food web — A freshwater aquatic and terrestrial food web. A food web (or food cycle) depicts feeding connections (what eats what) in an ecological community. Ecologists can broadly lump all life forms into one of two categories called trophic levels: 1) the … Wikipedia
Troll (Discworld) — Trolls in Terry Pratchett s Discworld novels, unlike the monstrous trolls of folklore and J. R. R. Tolkien, have been subverted into a moderately civilised race. Trolls on the Discworld are, essentially, living, mobile rocks. Trolls have grown to … 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
GEOGRAPHICAL SURVEY — Names The name Ereẓ Israel (the Land of Israel) designates the land which, according to the Bible was promised as an inheritance to the Israelite tribes. In the course of time it came to be regarded first by the Jews and then also by the… … Encyclopedia of Judaism
Nutrient cycle — … Wikipedia
Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… … Wikipedia
détritique — [ detritik ] adj. • 1838; de détritus ♦ Géol. Qui est formé au moins partiellement de débris. Roche sédimentaire détritique. Accumulations détritiques. Qui provient de la désagrégation d une roche préexistante. Minéral détritique. ● détritique… … Encyclopédie Universelle
Cretaceous–Tertiary extinction event — Artist s rendering of bolide impact Badlands nea … Wikipedia
