pisolitic iron

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• Iron ore — Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in colour from dark grey, bright yellow, deep purple, to rusty red. The iron itself is usually found in the …   Wikipedia

• bauxite — bauxitic /bawk sit ik, boh zit /, adj. /bawk suyt, boh zuyt/, n. a rock consisting of aluminum oxides and hydroxides with various impurities: the principal ore of aluminum. [1860 65; named after Les Baux, near Arles in S France; see ITE1] * * *… …   Universalium

• Western Africa — ▪ region, Africa Introduction       region lying south of the Sahara and east and north of the Atlantic Ocean. It is latitudinally divided into two parallel belts of land: the western portion of the Sudan, a geographic area that stretches across… …   Universalium

• laterite — lateritic /lat euh rit ik/, adj. /lat euh ruyt /, n. Geol. 1. a reddish ferruginous soil formed in tropical regions by the decomposition of the underlying rocks. 2. a similar soil formed of materials deposited by water. 3. any soil produced by… …   Universalium

• Oxide minerals — ▪ Table Oxide minerals name colour lustre Mohs hardness specific gravity anatase brown to indigo blue and black; also variable adamantine to metallic adamantine 5½–6 3.8–4.0 boehmite white, when pure 3 3.0–3.1 brookite various browns metallic… …   Universalium

• Nullagine, Western Australia — Nullagine Western Australia Location of Nullagine in Western Australia (red) …   Wikipedia

• Microspherulite — Microspherulites are microscopic spherical particles with < 2 mm diameters, usually in the 100 micrometre range, mainly consisting of mineral material (the Greek litos means stone ). Only bodies created by natural physico chemical… …   Wikipedia

• Abrus — Pea Pea, n.; pl. {Peas}or {Pease}. [OE. pese, fr. AS. pisa, or OF. peis, F. pois; both fr. L. pisum; cf. Gr. ?, ?. The final s was misunderstood in English as a plural ending. Cf. {Pease}.] 1. (Bot.) A plant, and its fruit, of the genus {Pisum},… …   The Collaborative International Dictionary of English

• Beach pea — Pea Pea, n.; pl. {Peas}or {Pease}. [OE. pese, fr. AS. pisa, or OF. peis, F. pois; both fr. L. pisum; cf. Gr. ?, ?. The final s was misunderstood in English as a plural ending. Cf. {Pease}.] 1. (Bot.) A plant, and its fruit, of the genus {Pisum},… …   The Collaborative International Dictionary of English

• Black-eyed pea — Pea Pea, n.; pl. {Peas}or {Pease}. [OE. pese, fr. AS. pisa, or OF. peis, F. pois; both fr. L. pisum; cf. Gr. ?, ?. The final s was misunderstood in English as a plural ending. Cf. {Pease}.] 1. (Bot.) A plant, and its fruit, of the genus {Pisum},… …   The Collaborative International Dictionary of English

• Bruchus pisi — Pea Pea, n.; pl. {Peas}or {Pease}. [OE. pese, fr. AS. pisa, or OF. peis, F. pois; both fr. L. pisum; cf. Gr. ?, ?. The final s was misunderstood in English as a plural ending. Cf. {Pease}.] 1. (Bot.) A plant, and its fruit, of the genus {Pisum},… …   The Collaborative International Dictionary of English