Columbia Encyclopedia

Search results

500 results found

Potter's Bar

(Encyclopedia)Potter's Bar, town (1991 pop. 22,755), Hertfordshire, central England, in the Midlands. Potter's Bar is a residential district, most of which is within the Green Belt Zone barred to industrial develop...

jasper, type of quartz

(Encyclopedia)jasper, opaque, impure cryptocrystalline quartz, usually red, but also yellow, green, and grayish blue. It is used as a gem. Ribbon jasper has the colors in stripes. ...

Notre Dame Mountains

(Encyclopedia)Notre Dame Mountains, section of the Appalachian system, extending c.500 mi (800 km) from the Green Mts. of Vermont into the Gaspé Peninsula, Canada. Worn low by erosion, the ancient mountains have a...

bloodstone

(Encyclopedia)bloodstone or heliotrope, green chalcedony spotted with red, used as a gem stone. It is found in India, the United States, Brazil, and Australia. ...

Menominee, river, United States

(Encyclopedia)Menominee, river, 118 mi (190 km) long, formed by the union of the Brule and the Michigamme rivers above Iron Mountain, W Upper Peninsula, N Mich., and flowing SE into Green Bay at Menominee. It passe...

Iruma

(Encyclopedia)Iruma ēro͞oˈmä [key], city, Saitama prefecture, central Honshu, Japan, on the Iruma River...

pond scum

(Encyclopedia)pond scum, accumulation of floating green algae on the surface of stagnant or slowly moving waters, such as ponds and reservoirs. One of the commonest forms is Spirogyra. ...

Valley Stream

(Encyclopedia)Valley Stream, village (1990 pop. 33,946), Nassau co., SE N.Y., on Long Island, a residential suburb of New York City; inc. 1925. Kennedy International Airport is to the west. Valley Stream is the sit...

Ashley, William Henry

(Encyclopedia)Ashley, William Henry, c.1778–1838, American fur trader and politician, b. Virginia. In 1820 he was elected lieutenant governor of Missouri. He sent fur-trading expeditions up the Missouri River to ...

Wollemi pine

(Encyclopedia)Wollemi pine wŏlˈəmīˌ [key], primitive tree, Wollemia nobilis, of the conifer family Araucariaceae, named after Wollemi National Park in New South Wales, Australia, where it was discovered in 199...