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Geology of the Grand Canyon: De Motte Park.

DE MOTTE PARK.Its length is about ten miles, its average width about two miles. It is a depressed area in the heart of the plateau and is on every side girt about by more elevated ground…

Agricola, Georgius

(Encyclopedia) Agricola, GeorgiusAgricola, Georgiusjôrˈjēə əgrĭkˈələ [key], Latinized from Georg BauerGeorg Bauergāˈôrk bouˈər [key], 1494–1555, German physician and scientist, known as the father of…

Ohio State University

(Encyclopedia) Ohio State University, main campus at Columbus; land-grant and state supported; coeducational; chartered 1870, opened 1873 as Ohio Agricultural and Mechanical College, renamed 1878.…

geophysics

(Encyclopedia) geophysics, study of the structure, composition, and dynamic changes of the earth, its atmosphere, hydrosphere and magnetosphere, based on the principles of physics. The term was…

Hutton, James

(Encyclopedia) Hutton, James, 1726–97, Scottish geologist, chemist, and naturalist. He was initially attracted to chemistry; he entered the legal profession at the Univ. of Edinburgh; turned to…

stratigraphy

(Encyclopedia) stratigraphy, branch of geology specifically concerned with the arrangement of layered rocks (see stratification). Stratigraphy is based on the law of superposition, which states that…

Cogswell, Joseph Green

(Encyclopedia) Cogswell, Joseph GreenCogswell, Joseph Greenkŏgzˈwĕl, –wəl [key], 1786–1871, American librarian and bibliographer, b. Ipswich, Mass. After studying abroad, Cogswell taught mineralogy…

expert system

(Encyclopedia) expert system, a computer system or program that uses artificial intelligence techniques to solve problems that ordinarily require a knowledgeable human. The method used to construct…

Saussure, Horace Bénédict de

(Encyclopedia) Saussure, Horace Bénédict deSaussure, Horace Bénédict deôräsˈ bānādēktˈ [key]Saussure, Horace Bénédict de də sōsürˈ [key], 1740–99, Swiss physicist and geologist. He was professor at…