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Rabaul

(Encyclopedia)Rabaul räˈboul [key], town (1990 pop. 17,044), on New Britain island, Bismarck Archipelago, a part of Papua New Guinea. Situated within an active caldera surrounded by volcanoes, the city has long b...

water skiing

(Encyclopedia)water skiing, sport of riding on skis along the water's surface while being towed by a motorboat. It probably originated on the French Riviera in the early 1920s, and was known in the United States by...

sodium carbonate

(Encyclopedia)sodium carbonate, chemical compound, Na2CO3, soluble in water and very slightly soluble in alcohol. Pure sodium carbonate is a white, odorless powder that absorbs moisture from the air, has an alkalin...

Petrified Forest National Park

(Encyclopedia)Petrified Forest National Park, 93,533 acres (37,881 hectares), E Ariz.; est. as a national monument 1906, designated a national park 1962. A part of the Painted Desert, it contains the largest known ...

León, city, Nicaragua

(Encyclopedia)León, city (1995 pop. 125,117), W Nicaragua. It is Nicaragua's second largest city and the rail and commercial center between Corinto and Managua. It was founded in 1524 on Lake Managua by Francisco ...

Kodiak Island

(Encyclopedia)Kodiak Island kōˈdēăkˌ [key], 5,363 sq mi (13,890 sq km), c.100 mi (160 km) long and 10–60 mi (16–96 km) wide, off S Alaska, separated from the Alaska Peninsula by Shelikof Strait. Alaska's l...

shale

(Encyclopedia)shale, sedimentary rock formed by the consolidation of mud or clay, having the property of splitting into thin layers parallel to its bedding planes. Shale tends to be fissile, i.e., it tends to split...

Captain Jack

(Encyclopedia)Captain Jack (d. 1873), subchief of the Modoc and leader of the hostile group in the Modoc War (1872–73). Jack, whose Modoc name was Kintpuash kĭntˈpo͞oäsh [key], had agreed (1864) to leave his ...

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...

lightning

(Encyclopedia)lightning, electrical discharge accompanied by thunder, commonly occurring during a thunderstorm. The discharge may take place between one part of a cloud and another part (intracloud), between one cl...