submerged sill

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• sill — noun Etymology: Middle English sille, from Old English syll; akin to Old High German swelli beam, threshold Date: before 12th century 1. a horizontal piece (as a timber) that forms the lowest member or one of the lowest members of a framework or… …   New Collegiate Dictionary

• iceberg — /uys berrg/, n. 1. a large floating mass of ice, detached from a glacier and carried out to sea. 2. Informal. an emotionally cold person. 3. Australian Informal. a person who swims or surfs regularly in winter. 4. tip of the iceberg, the first… …   Universalium

• Caribbean Sea — a part of the Atlantic Ocean bounded by Central America, the West Indies, and South America. ab. 750,000 sq. mi. (1,943,000 sq. km); greatest known depth 22,788 ft. (6946 m). Also called Caribbean. * * * Arm of the Atlantic Ocean. It covers about …   Universalium

• Mediterranean Sea — a sea surrounded by Africa, Europe, and Asia. 2400 mi. (3865 km) long; 1,145,000 sq. mi. (2,965,550 sq. km); greatest known depth 14,436 ft. (4400 m). Also called Mediterranean. * * * Inland sea enclosed by Europe, Africa, and Asia. Its west east …   Universalium

• Slave craton — which is one of the oldest dated rock units on Earth at 4.03 Ga. The crust of the Slave craton is thought to have amalgamated during a 2.69 Ga collision between a proto Slave western basement complex, known as the Central Slave Basement Complex,… …   Wikipedia

• Olympic-Wallowa Lineament — Location of the Olympic Wallowa Lineament. Is the OWL an optical illusion? The Olympic Wallowa lineament (OWL) – first reported by cartographer Erwin Raisz in 1945 [1] on a relief map of the continental United States – is a physiographic feature… …   Wikipedia

• GEOGRAPHICAL SURVEY — Names The name Ereẓ Israel (the Land of Israel) designates the land which, according to the Bible was promised as an inheritance to the Israelite tribes. In the course of time it came to be regarded first by the Jews and then also by the… …   Encyclopedia of Judaism

• Old Mobile Site — Old Mobile Site; Fort Louis De La Louisiane U.S. National Register of Historic Places …   Wikipedia

• boundary ecosystem — ▪ biology Introduction       complex of living organisms in areas where one body of water meets another, e.g., estuaries and lagoons, or where a body of water meets the land, e.g., marshes. The latter are often called wetlands.       Boundary… …   Universalium

• Puget Sound environmental issues — articleissues POV = December 2007 copyedit = January 2007 citationstyle = October 2008The environmental health of Puget Sound, Washington has a diverse and complex history related to a long, involved relationship with marine and freshwater… …   Wikipedia

• Pilbara craton — The Pilbara craton (the Pilbara province in northwest Western Australia), along with the Kaapvaal craton (the Kaapvaal province of South Africa) are the only remaining areas of pristine Archaean 3.6 2.7 Ga crust on Earth. Similarities of their… …   Wikipedia