mined bed
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Oil shale industry — Stuart oil shale pilot plant (now dismantled) Oil shale industry is an industry of mining and processing of oil shale a fine grained sedimentary rock, containing significant amounts of kerogen (a solid mixture of organic chemical compounds), from … Wikipedia
South Maury Island environmental issues — are linked to broader Puget Sound environmental issues. These include concerns regarding declining salmon and forage fish populations, degraded critical marine and shoreline habitats, and threatened species such as the Orca.Many of these concerns … Wikipedia
Naval mine — Polish wz. 08/39 contact mine. The protuberances around the top of the mine, called Hertz horns, are part of the detonation mechanism … Wikipedia
Copper mining in the United States — US primary copper production 1900 2008. Source: USGS … Wikipedia
Oil shale extraction — is an industrial process in which kerogen mdash;a mixture of organic chemical compounds (including hydrocarbons) found in oil shale mdash;is converted into synthetic crude oil through pyrolysis. In pyrolysis, oil shale is heated in the absence of … Wikipedia
performing arts — arts or skills that require public performance, as acting, singing, or dancing. [1945 50] * * * ▪ 2009 Introduction Music Classical. The last vestiges of the Cold War seemed to thaw for a moment on Feb. 26, 2008, when the unfamiliar strains … Universalium
tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening … Universalium
Djebel Ressas — Jebel Ressas Djebel Ressas in cloud cover, as viewed from the northwest Elevation … 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
Copper — For other uses, see Copper (disambiguation) … Wikipedia
Harz — Mountains redirects here. For the district of the same name, see Harz (district). Harz Range Country Germany … Wikipedia
