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geology
(Encyclopedia) geology, science of the earth's history, composition, and structure, and the associated processes. It draws upon chemistry, biology, physics, astronomy, and mathematics (notably…Hell Gate
(Encyclopedia) Hell Gate, narrow channel of the East River, SE N.Y., between Wards Island and Astoria, Queens, New York City. Named Hellegat by the Dutch navigator Adriaen Block, who passed through…stromatolite
(Encyclopedia) stromatolite, layered structures produced by the binding together of sediments by a thin layer of cyanobacteria. The layers, which are deposited very slowly, gradually produce rounded…pyrrhotite
(Encyclopedia) pyrrhotitepyrrhotitepĭrˈətīt [key] or magnetic pyrites, bronze-yellow to bronze-red mineral, a sulfide of iron sometimes containing nickel. It tarnishes easily and is somewhat magnetic…Ouachita Mountains
(Encyclopedia) Ouachita Mountains, range of east-west ridges between the Arkansas and Red rivers, extending c.200 mi (320 km) from central Ark. into SE Okla. Magazine Mt. (c.2,800 ft/850 m high) is…black fly
(Encyclopedia) black fly, name for any of the flies of the family Simuliidae. The black fly is about 1&fslsh;8 in. (3.2 mm) long and has large eyes, short legs, a stout, humped back, broad gauzy…spring, in geology
(Encyclopedia) spring, in geology, natural flow of water from the ground or from rocks, representing an outlet for the water that has accumulated in permeable rock strata underground. Some of the…August 2016: Earthquake Rocks Italy
U.S. News | Disasters & Science News Here's a slideshow depicting the major science and disaster news events of August 2016…Rock County, NE Census Data
Nebraska Rock County, Nebraska People QuickFactsRock CountyNebraskaPopulation, 2005 estimate 1,5671,758,787Population, percent change, April 1, 2000 to July 1, 2005 -10.8%2.8%Population, 2000…Rock County, MN Census Data
Minnesota Rock County, Minnesota People QuickFactsRock CountyMinnesotaPopulation, 2005 estimate 9,5205,132,799Population, percent change, April 1, 2000 to July 1, 2005 -2.1%4.3%Population,…Trending
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