brown clay iron ore

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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

• iron processing — Introduction       use of a smelting process to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of iron and of its preparation for smelting.       Iron (Fe) is a… …   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

• Yellow copper ore — Yellow Yel low (y[e^]l l[ o]), a. [Compar. {Yellower} (y[e^]l l[ o]*[ e]r); superl. {Yellowest}.] [OE. yelow, yelwe, [yogh]elow, [yogh]eoluw, from AS. geolu; akin to D. geel, OS. & OHG. gelo, G. gelb, Icel. gulr, Sw. gul, Dan. guul, L. helvus… …   The Collaborative International Dictionary of English

• Yellow lead ore — Yellow Yel low (y[e^]l l[ o]), a. [Compar. {Yellower} (y[e^]l l[ o]*[ e]r); superl. {Yellowest}.] [OE. yelow, yelwe, [yogh]elow, [yogh]eoluw, from AS. geolu; akin to D. geel, OS. & OHG. gelo, G. gelb, Icel. gulr, Sw. gul, Dan. guul, L. helvus… …   The Collaborative International Dictionary of English

• Wealden iron industry — The Wealden iron industry was located in the Weald of south eastern England. It was formerly an important industry, producing a large proportion of the bar iron made in England in the 16th century and most British cannon until about 1770.… …   Wikipedia

• Palaeontology —     Palæontology     † Catholic Encyclopedia ► Palæontology     (logos ton palaion onton)     Palæontology, or the science of fossils, deals with extinct or primeval animals and plants. It treats of their characteristics, classification, life and …   Catholic encyclopedia

• Marcellus Formation — Stratigraphic range: Middle Devonian …   Wikipedia

• United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …   Universalium

• United Kingdom — a kingdom in NW Europe, consisting of Great Britain and Northern Ireland: formerly comprising Great Britain and Ireland 1801 1922. 58,610,182; 94,242 sq. mi. (244,100 sq. km). Cap.: London. Abbr.: U.K. Official name, United Kingdom of Great… …   Universalium

• India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… …   Universalium