Columbia Encyclopedia

Search results

500 results found

pothole

(Encyclopedia)pothole, in geology, cylindrical pit formed in the rocky channel of a turbulent stream. It is formed and enlarged by the abrading action of pebbles and cobbles that are carried by eddies, or circular ...

Cairngorms

(Encyclopedia)Cairngorms kârngôrmzˈ, kârnˈgôrmz [key], group of mountains forming part of the Grampian Mts, in Highland, Moray, and Aberdeenshire, central Scotland, between the Dee and the upper Spey rivers; ...

Cairo, city, United States

(Encyclopedia)Cairo kāˈrō, kâˈrō [key], city (2020 pop. 1,878), seat of Alexander co., extreme S Ill., on a ...

bore

(Encyclopedia)bore, inrush of water that advances upstream with a wavelike front, caused by the progress of incoming tide from a wide-mouthed bay into its narrower portion. The tidal movement tends to be retarded b...

Virunga

(Encyclopedia)Virunga vēro͝ongˈgä [key], volcanic range of mountains, E Congo, N Rwanda, and SW Uganda, central Africa, NE of Lake Kivu. It extends along the eastern rim of the Great Rift Valley and separates t...

Vosges, mountain range, France

(Encyclopedia)Vosges vōzh [key], mountain range, E France, between the Alsatian plain in the east and the plateau of S Lorraine in the west. It extends generally north and parallel to the Rhine River for c.120 mi ...

Ussuri

(Encyclopedia)Ussuri o͞oso͞oˈrē [key], Mandarin Wusuli, river, c.365 mi (590 km) long, formed by the confluence of the Ulukhe and Daubikhe rivers, S Maritime Territory, Russian Far East. It flows N to the Amur ...

Vaal

(Encyclopedia)Vaal fäl [key], river, c.750 mi (1,210 km) long, rising in Mpumalanga, NE South Africa, and flowing SW to the Orange River. It forms most of the northern border of the Free State. The river's flow is...

Turan

(Encyclopedia)Turan to͞oränˈ [key], desert lowland, shared by Kazakhstan, Uzbekistan, and Turkmenistan, S and E of the Aral Sea. The Amu Darya and Syr Darya rivers divide it into the Kara Kum desert in the south...

Songjiang

(Encyclopedia)Songjiang or Sungkiang both: so͞ongˈjyängˈ [key], former province (c.32,000 sq mi/82,880 sq km), NE China. Mudanjiang was the capital. It was one of nine provinces created in Manchuria by the Chin...