Columbia Encyclopedia

Search results

500 results found

silt

(Encyclopedia)silt, predominantly quartz mineral particles that are between sand size and clay size, i.e., between 1⁄16 and 1⁄256 mm (1⁄406 –1⁄6502 in.) in diameter. Silt, like clay and sand, is a product...

Fletcher, John Gould

(Encyclopedia)Fletcher, John Gould, 1886–1950, American poet, b. Little Rock, Ark., educated (1903–7) at Harvard. After traveling throughout Europe, he became a leader of the imagists in England. His early coll...

Arches National Park

(Encyclopedia)Arches National Park, 76,519 acres (30,979 hectares), E Utah; est. as a national monument 1929, designated a national park 1971. Located in red-rock country and overlooking the gorge of the Colorado R...

Blitzstein, Marc

(Encyclopedia)Blitzstein, Marc (Marcus Samuel Blitzstein), 1905–64, American composer, pianist, and librettist, b. Philadelphia. After attending the Univ. of Pennsylvania and the Curtis Institute of Music, he stu...

Moog, Robert Arthur

(Encyclopedia)Moog, Robert Arthur mōg [key], 1934–2005, American electronic engineer, inventor of the Moog synthesizer, b. New York City, grad. Queens College (B.S, 1957), Columbia (B.S., 1957), Cornell (Ph.D., ...

spring, in geology

(Encyclopedia)spring, in geology, natural flow of water from the ground or from rocks, representing an outlet for the water that has accumulated in permeable rock strata underground. Some of the water that falls as...

Cashel

(Encyclopedia)Cashel kăˈshəl [key] [Irish,=castle], town, Co. Tipperary, S central Republic of Ireland. ...

concretion

(Encyclopedia)concretion, mass or nodule of mineral matter, usually oval or nearly spherical in shape, and occurring in sedimentary rock. It is formed by the accumulation of mineral matter in the pore spaces of the...

talus

(Encyclopedia)talus tāˈləs [key], deposit of rock fragments detached from cliffs or mountain slopes by weathering and piled up at their bases. A talus is a common geologic feature in regions of high cliffs. The ...

Davis, Miles

(Encyclopedia)Davis, Miles, 1926–91, American jazz musician, b. Alton, Ill. Rising to prominence with the birth of modern jazz in the mid-1940s, when he was a sideman in Charlie Parker's bop quintet, Davis became...