pyritic 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

• Summitville mine — The Summitville Mine was a gold mining site in Rio Grande County, Colorado convert|25|mi|km|0|lk=on south of Del Norte. It is remembered for the environmental damage caused in the 1980s by the accidental leakage of mining by products into local… …   Wikipedia

• Lead chamber process — The lead chamber process was an industrial method used to produce sulfuric acid in large quantities. It has been largely supplanted by the contact process. In 1746 in Birmingham, England, John Roebuck began producing sulfuric acid in lead lined… …   Wikipedia

• pyrite — pyritic /puy rit ik, peuh /, pyritical, pyritous /peuh ruy teuhs, puy /, adj. /puy ruyt/, n. a very common brass yellow mineral, iron disulfide, FeS2, with a metallic luster, burned to sulfur dioxide in the manufacture of sulfuric acid:… …   Universalium

• Marcellus Formation — Stratigraphic range: Middle Devonian …   Wikipedia

• bacteria — bacterial, adj. bacterially, adv. /bak tear ee euh/, n.pl., sing. bacterium / tear ee euhm/. ubiquitous one celled organisms, spherical, spiral, or rod shaped and appearing singly or in chains, comprising the Schizomycota, a phylum of the kingdom …   Universalium

• Copper mining in the United States — US primary copper production 1900 2008. Source: USGS …   Wikipedia

• Mount Isa Mines — Location …   Wikipedia

• Ducktown, Tennessee —   City   Ducktown Historic District …   Wikipedia

• History of Tasmania — The history of Tasmania begins at the end of the most recent ice age (approximately 10 000 years ago) when it is believed that the island was joined to the Australian mainland.Indigenous peopleTasmania was totally inhabited by an indigenous… …   Wikipedia

• Gold mining in the United States — has taken place since the discovery of gold at the Reed farm in North Carolina in 1799.In 2006 the United States produced approximately 8.360 million troy ounces (260 tonnes) of gold, making it the second or third largest gold producing nation,… …   Wikipedia