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Salt River Bay National Historical Park and Ecological Preserve

(Encyclopedia)Salt River Bay National Historical Park and Ecological Preserve: see National Parks and Monuments (table)national parks and monuments (table). ...

anthracene

(Encyclopedia)CE5 anthracene ănˈthrəsēn [key], C14H10, solid organic compound derived from coal tar. It melts at 218℃ and boils at 354℃. When pure it is colorless and has a violet fluorescence; it darken...

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...

Great Basin

(Encyclopedia)Great Basin, semiarid, N section of the Basin and Range province, the intermontane plateau region of W United States and N Mexico. Lying mostly in Nevada and extending into California, Oregon, Idaho, ...

Port Huron

(Encyclopedia)Port Huron hyo͝orˈən [key], city (1990 pop. 33,694), seat of St. Clair co., S Mich., a natural, deepwater port of entry at the junction of the St. Clair River with Lake Huron; inc. 1857. It is a sh...

Tuz, Lake

(Encyclopedia)Tuz, Lake to͞oz [key], shallow salt lake, c.625 sq mi (1,620 sq km), central Turkey. Salt is mined there. ...

atomic weight

(Encyclopedia)atomic weight, mean (weighted average) of the masses of all the naturally occurring isotopes of a chemical element, as contrasted with atomic mass, which is the mass of any individual isotope. Althoug...

oxidation and reduction

(Encyclopedia)oxidation and reduction, complementary chemical reactions characterized by the loss or gain, respectively, of one or more electrons by an atom or molecule. Originally the term oxidation was used to re...

zirconium

(Encyclopedia)zirconium zərkōˈnēəm [key], metallic chemical element; symbol Zr; at. no. 40; at. wt. 91.224; m.p. about 1,852℃; b.p. 4,377℃; sp. gr. 6.5 at 20℃; valence +2, +3, or +4. Zirconium is a very ...

Sivash Sea

(Encyclopedia)Sivash Sea sēväshˈ [key] or Putrid Sea, salt lagoon, c.1,000 sq mi (2,590 sq km), extending along the northeastern coast of Crimea. It is separated—except at the Genichesk Strait—from the Sea o...