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basalt
(Encyclopedia) basaltbasaltbəsôltˈ, băsˈôlt [key], fine-grained rock of volcanic origin, dark gray, dark green, brown, reddish, or black in color. Basalt is an igneous rock, i.e., one that has…gabbro
(Encyclopedia) gabbro: see basalt.diabase
(Encyclopedia) diabase: see basalt.Columbia Plateau
(Encyclopedia) Columbia Plateau, physiographic region of North America, c.100,000 sq mi (259,000 sq km), NW United States, between the Rocky Mts. and the Cascade Range in Washington, Oregon, and…Watchung Mountains
(Encyclopedia) Watchung Mountains, two long low ridges of volcanic origin, from 400 to 500 ft (122–152 m) high, N central N.J. They curve c.40 mi (60 km) between Paterson and Somerville. Basalt is…Olmec
(Encyclopedia) OlmecOlmecōlˈmĕk [key], term denoting the culture of ancient Mexican natives inhabiting the tropical coastal plain of the contemporary states of Veracruz and Tabasco, between 1300 and…Rathlin Island
(Encyclopedia) Rathlin IslandRathlin Islandrăthˈlĭn [key], 5 sq mi (13 sq km), Moyle dist., N Northern Ireland. Its cliffs, of limestone and basalt, rise at Slieveacarn to 449 ft (137 m). Farming and…Hula, Lake
(Encyclopedia) Hula, Lake, or Lake HulehHula, Lake,both: h&oomacr;ˈlā [key], Arabic Bahr al Hulah, near sea-level lake formed by a natural dam of basalt, NE Israel; the Jordan River exits from…Paektu, Mount
(Encyclopedia) Paektu or Baekdu, Mount, volcanic peak, 9,003 ft (2,744 m) high, in the Changbai Mts. on the border between North Korea and China. The highest mountain in Korea, it rises from a basalt…feldspar
(Encyclopedia) feldsparfeldsparfĕlˈspär, fĕldˈ– [key] or felsparfeldsparfĕlˈspär [key], an abundant group of rock-forming minerals which constitute 60% of the earth's crust. Chemically the feldspars…Trending
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