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Great Sand Dunes National Park and Preserve
(Encyclopedia)Great Sand Dunes National Park and Preserve, 132.4 sq mi (343 sq km), in the San Luis Valley of S Colorado; est. as a national monument 1932, designated a national park 2004. Lying in an area of high ...Loire, river, France
(Encyclopedia)Loire, longest river of France, c.630 mi (1,010 km) long, rising in the Cévennes Mts., SE France, and flowing in an arc through central and W France to the Atlantic Ocean at Saint-Nazaire. The upper ...Ottawa, river, Canada
(Encyclopedia)Ottawa, river, c.700 mi (1,130 km) long, largest tributary of the St. Lawrence River, Canada. It rises in the Laurentian Highlands, SW Que., and flows generally W through La Vérendrye Provincial Park...Magdalena
(Encyclopedia)Magdalena mägᵺälāˈnä [key], river, c.1,000 mi (1,600 km) long, rising in the Cordillera Central, SW Colombia and flowing N to the Caribbean Sea near Barranquilla. It flows in a fault-block vall...Rezeph
(Encyclopedia)Rezeph rēˈzĕf [key], ancient city, probably to be identified with Rasafa, E of Palmyra in the Euphrates valley. It is mentioned in the Bible. ...Oka, river, Siberian Russia
(Encyclopedia)Oka, river, c.600 mi (970 km) long, rising in the Sayan Mts., Buryat Republic, S central Siberian Russia. It flows N through Irkutsk oblast to join the Angara River below Bratsk. The lower Oka valley ...Beracah
(Encyclopedia)Beracah bērāˈkə [key], in the Bible. 1 One who joined David at Ziklag. 2 Valley, N of Hebron, running roughly east-west. ...Torrens, Lake
(Encyclopedia)Torrens, Lake, shallow salt lake, 2,230 sq mi (5,776 sq km), central South Australia state, Australia. In a rift valley, it is 120 mi (193 km) long and is Australia's second largest lake. It becomes p...ruthenium
(Encyclopedia)ruthenium ro͞othēˈnēəm [key], metallic chemical element; symbol Ru; at. no. 44; at. wt. 101.07; m.p. about 2,310℃; b.p. about 3,900℃; sp. gr. 12.41 at 20℃; valence commonly +2, +3, +4, +6, ...quartz
(Encyclopedia)quartz, one of the commonest of all rock-forming minerals and one of the most important constituents of the earth's crust. Chemically, it is silicon dioxide, SiO2. It occurs in crystals of the hexagon...Browse by Subject
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