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sphalerite

(Encyclopedia)sphalerite sfălˈərīt, sfāˈ– [key], mineral composed of zinc sulfide, usually containing some iron and a little cadmium. It occurs in crystals of the isometric system but more generally in clea...

Eocene epoch

(Encyclopedia)Eocene epoch ēˈəsēnˌ [key], second epoch of the Tertiary period in the Cenozoic era of geologic time, from approximately 54.9 to 38 million years ago. The Eocene in North America was marked by th...

praseodymium

(Encyclopedia)praseodymium prāˌzēōdĭmˈēəm, –sēō– [key] [Gr., =green twin], metallic chemical element; symbol Pr; at. no. 59; at. wt. 140.90765; m.p. 931℃; b.p. 3,512℃; sp. gr. about 6.8; valence +...

mountain men

(Encyclopedia)mountain men, fur trappers and traders in the Rocky Mts. during the 1820s and 30s. Their activities opened that region of the United States to general knowledge. Since the days of French domination th...

edelweiss

(Encyclopedia)edelweiss āˈdəlvīs [key], perennial aster plant (genus Leontopodium) found at high altitudes in the mountains of Europe, Asia, and South America. It is about 6 in. (15.2 cm) tall with woolly-white...

Coast Ranges

(Encyclopedia)Coast Ranges, series of mountain ranges along the Pacific coast of North America, extending from SE Alaska to Baja California; from 2,000 to 20,000 ft (610–6,100 m) high. The ranges include the St. ...

Hindu Kush

(Encyclopedia)Hindu Kush hĭnˈdo͞o ko͝osh [key], a high mountain system, extending c.500 mi (800 km) W from the Pamir Knot, N Pakistan, into NE Afghanistan; rising to 25,236 ft (7,692 m) in Tirich Mir, on the bo...

Gifford, Sanford Robinson

(Encyclopedia)Gifford, Sanford Robinson, 1823–80, American painter, b. Greenfield, N.Y. A major painter of the American movement known as luminism, Gifford, who was influenced by Thomas Cole early in his career, ...

Montpelier, city, United States

(Encyclopedia)Montpelier mŏntpēlˈyər [key], city (1990 pop. 8,247), state capital (since 1805) and seat of Washington co., central Vt., at the junction of the Winooski and North Branch rivers; inc. 1855. The ec...

Asheville

(Encyclopedia)Asheville ăshˈvəl, –vĭl [key], city (2020 pop. 94,589), seat of Buncombe co., W N.C., on the French Broad and Swannanoa rivers and on a plateau in the Blue Ridge Mts...