mined rock

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• Rock phosphate — is a general term for rock that contains a high concentration of phosphate minerals, which commonly belong to the apatite group. Phosphate rock minerals are the only significant global resources of phosphorus. Phosphorus is an essential element… …   Wikipedia

• Underground mining (hard rock) — A three dimensional model of an underground mine with shaft access Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, mainly those containing metals[1] such as ore containing gold …   Wikipedia

• Phosphate rock — or phosphorite is a general description applied to several kinds of rock which contain significant concentrations of phosphate minerals, which are minerals that contain the phosphate ion in their chemical structure.Many kinds of rock contain… …   Wikipedia

• Red Rock Island — is an uninhabited, 5.8 acre (2.3 ha) island in the San Francisco Bay located just south of the Richmond San Rafael Bridge.cite episode title = Bay Area Private Island Sold for $10M url = http://www.npr.org/templates/story/story.php?storyId=1194537… …   Wikipedia

• Cumulate rock — Cumulate rocks are igneous rocks formed by the accumulation of crystals from a magma either by settling or floating. Cumulate rocks are named according to their texture; cumulate texture is diagnostic of the conditions of formation of this group… …   Wikipedia

• Flat Rock, Surry County, North Carolina — Flat Rock is a census designated place (CDP) in Surry County, North Carolina, United States. The name Flat Rock stems from the community s granite quarry. The granite quarry is the largest open face granite quarry in the world, and has been mined …   Wikipedia

• Underground mining (soft rock) — refers to a group of underground mining techniques used to extract coal, oil shale and other minerals or geological materials from sedimentary ( soft ) rocks. Because deposits in sedimentary rocks are commonly layered and relatively less hard,… …   Wikipedia

• salt — salt1 saltlike, adj. /sawlt/, n. 1. a crystalline compound, sodium chloride, NaCl, occurring as a mineral, a constituent of seawater, etc., and used for seasoning food, as a preservative, etc. 2. table salt mixed with a particular herb or… …   Universalium

• SALT — /sawlt/, n. See Strategic Arms Limitation Talks. * * * I Chemical compound formed when the hydrogen of an acid is replaced by a metal or its equivalent, such as ammonium (NH4). Typically, an acid and a base react to form a salt and water. Most… …   Universalium

• 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

• Compass Minerals — International, Inc. Type Public Traded as NYSE: CMP Industry Mi …   Wikipedia