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Allegheny Plateau
(Encyclopedia)Allegheny Plateau, dissected plateau, western part of the Appalachian Mts., extending c.500 mi (800 km) SW from N Pa. to SW Va., rising to c.4,860 ft (1,480 m) at Spruce Knob, the highest peak in West...Altoona
(Encyclopedia)Altoona ălto͞oˈnə [key], industrial city (2020 pop. 43,963), Blair co., central Pa., on the eastern slopes of the Allegheny Mts., near the source of the Juniata River;...Du Bois
(Encyclopedia)Du Bois do͞oˈbois, dəboisˈ [key], city (2020 pop. 7,272), Clearfield co., W central Pa., in the ...Allegheny
(Encyclopedia)Allegheny ălˈəgāˌnē, ălˈəgäˌnē [key], river, 325 mi (523 km) long, rising in N central Pa., and flowing NW into N.Y., then SW through Pa. to the Monongahela, with which it forms the Ohio R...Plum, city, Pennsylvania
(Encyclopedia)Plum, borough (1990 pop. 25,609), Allegheny co., SW Pa. on the Allegheny River, in a bituminous coal area; founded 1788, inc. 1956. It is a residential suburb of Pittsburgh. Apples and nursery stock a...plateau
(Encyclopedia)plateau, elevated, level or nearly level portion of the earth's surface, larger in summit area than a mountain and bounded on at least one side by steep slopes, occurring on land or in oceans. Some pl...Conemaugh
(Encyclopedia)Conemaugh kŏnˈəmôˌ [key], river c.70 mi (110 km) long, rising in the Allegheny Mts. and flowing NW to the Allegheny River, SW Pa. Federal flood-control works on the river and its tributaries incl...Appalachian Mountains
(Encyclopedia)Appalachian Mountains ăpəlāˈchən, –chēən, –lăchˈ– [key], mountain system of E North America, extending in a broad belt c.1,600 mi (2,570 km) SW from the Gaspé Peninsula in Quebec prov....Olean
(Encyclopedia)Olean ōˈlēănˌ [key], city (1990 pop. 16,946), Cattaraugus co., W N.Y., on the Allegheny River near the Pa. line; settled 1804, inc. 1893. The city formerly had an oil-based economy related to nea...Castle Shannon
(Encyclopedia)Castle Shannon, residential borough (2020 pop. 8,249), Allegheny co., SW Pa., a suburb S of Pittsburgh; inc. 1919. ...Browse by Subject
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