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pothole

(Encyclopedia)pothole, in geology, cylindrical pit formed in the rocky channel of a turbulent stream. It is formed and enlarged by the abrading action of pebbles and cobbles that are carried by eddies, or circular ...

Wen Jiabao

(Encyclopedia)Wen Jiabao wĕnˈ jyäˈbouˈ [key], 1942–, Chinese political leader, b. Tianjin. Originally a geologist, he worked for the Gansu provincial geological bureau (1968–82), where he was the head of i...

Dutton, Clarence Edward

(Encyclopedia)Dutton, Clarence Edward, 1841–1912, American geologist, b. Wallingford, Conn., grad. Yale, 1860. After service in the army during and after the Civil War, he was a member (1875–91) of the U.S. Geo...

Fenneman, Nevin M.

(Encyclopedia)Fenneman, Nevin M. nĕvˈĭn fĕnˈəmən [key], 1865–1945, American geologist, geographer, and teacher, b. Lima, Ohio; B.A. (1883) Heidelberg College, Ohio; M.A. (1900); Ph.D. (1901) Univ. of Chica...

Werner, Abraham Gottlob

(Encyclopedia)Werner, Abraham Gottlob äˈbrähäm gôtˈlōp vĕrˈnər [key], 1750–1817, German geologist. In 1775 he became inspector and teacher in the mining academy at Freiberg, which through his efforts be...

Tharp, Marie

(Encyclopedia)Tharp, Marie, 1920–2006, American oceanographer and cartographer, grad. Univ. of Michigan (M.A. 1944). A geologist with experience in mapping, she came to Columbia Univ. as a geology research assist...

Novalis

(Encyclopedia)Novalis frēˈdrĭkh fən härˈdənbĕrk [key], 1772–1801, German poet. He studied philosophy under Schiller, Schlegel, and Fichte and was especially influenced by Fichte. He later studied geology....

Manning, Patrick Augustus Mervyn

(Encyclopedia)Manning, Patrick Augustus Mervyn, 1946–2016, Trinidadian political leader, prime minister of Trinidad and Tobago (1991–95, 2001–10). He entered politics in the 1960s while studying geology at th...

petrology

(Encyclopedia)petrology, branch of geology specifically concerned with the origin, composition, structure, and properties of rocks, primarily igneous and metamorphic, and secondarily sedimentary. It includes petrog...

horizon

(Encyclopedia)horizon, in astronomy, roughly circular line bounding an observer's view of the surface of the earth where the sky and earth seem to meet. This is the visible horizon. At sea the visible horizon is a ...