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Aïr Massif

(Encyclopedia)Aïr Massif or Aïr Mountains, Africa: see Sahara. ...

Pacific Margin

(Encyclopedia)Pacific Margin, western section of the great North American Cordillera, W United States and W Canada, stretching from SW Alaska to S Calif. It is composed of a central lowland region (Central Valley, ...

fold

(Encyclopedia)fold, in geology, bent or deformed arrangement of stratified rocks. These rocks may be of sedimentary or volcanic origin. Although stratified rocks are normally deposited on the earth's surface in hor...

Paleozoic era

(Encyclopedia)Paleozoic era pāˌlēəzōˈĭk [key], a major division (era) of geologic time (see Geologic Timescale, tablegeologic timescale, table) occurring between 570 to 240 million years ago. It is subdivide...

foehn

(Encyclopedia)foehn fān, Ger. fön [key], warm, dry wind that occurs on the leeward slopes of a ridge of mountains. The term was originally applied to a wind of the Alps but is now used as a generic term for all w...

Milford Sound

(Encyclopedia)Milford Sound, inlet of the Tasman Sea, indenting SW South Island, New Zealand. Part of Fiordland National Park, it is a well-known resort area. Mountains rise steeply from the shore to a height of 9,...

Mohawk, river, United States

(Encyclopedia)Mohawk, river, c.140 mi (230 km) long, rising in central New York and flowing S then SE past Utica and Schenectady to enter the Hudson River at Cohoes. The Mohawk is canalized from Rome to its mouth (...

Wilderness Road

(Encyclopedia)Wilderness Road, principal avenue of westward migration for U.S. pioneers from c.1790 to 1840, blazed in 1775 by the American frontiersman Daniel Boone and an advance party of the Transylvania Company...

Gordon

(Encyclopedia)Gordon, river in W Tasmania, Australia, 125 mi (200 km) long. Flowing from mountains to the W coast, its main tributaries are the Franklin and Denison from the N, and Serpentine and Olga to the S. In ...

Struma

(Encyclopedia)Struma stro͞oˈmä [key], Gr. Strimón, river, 216 mi (348 km) long, rising in the mountains of W Bulgaria and flowing S, through NE Greece, to the Aegean Sea. ...