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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 ...Chotts, Plateau of the
(Encyclopedia)Chotts, Plateau of the shŏts [key] [Arab.,=salt lake], plateau region of the Atlas Mts., alt. c.3,500 ft (1,070 m), N Algeria, N Africa. The plateau is c.125 mi (200 km) wide in the west, narrowing i...Allegheny Portage Railroad National Historic Site
(Encyclopedia)Allegheny Portage Railroad National Historic Site: see National Parks and Monuments (table)national parks and monuments (table). ...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...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. ...Backbone Mountain
(Encyclopedia)Backbone Mountain, peak, 3,360 ft (1,024 m) high, NW Md., in the Allegheny Mts.; highest elevation in the state.Browse by Subject
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