Columbia Encyclopedia

Search results

500 results found

Janesville

(Encyclopedia)Janesville, city (1990 pop. 52,133), seat of Rock co., S central Wis., on the Rock River; inc. 1853. It is an industrial and commercial center in a grain, dairy farm, and tobacco area. Manufactures in...

joint, in geology

(Encyclopedia)joint, in geology, fracture in rocks along which no appreciable movement has occurred (see fault). Nearly vertical, or sheet, joints that result from shrinkage during cooling are commonly found in ign...

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...

sandstone

(Encyclopedia)sandstone, sedimentary rock formed by the cementing together of grains of sand. The usual cementing material in sandstone is calcium carbonate, iron oxides, or silica, and the hardness of sandstone va...

Bacharach, Burt

(Encyclopedia)Bacharach, Burt băkˈərăkˌ [key], 1928–2023, American composer, arranger, and conductor, b. ...

syenite

(Encyclopedia)syenite sīˈənīt [key], coarse-grained igneous rock, similar in appearance and composition to granite. Unlike granite, it contains little or no quartz. The chief minerals in syenite are the feldspa...

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...

Tiruchirapalli

(Encyclopedia)Tiruchirapalli trĭchĭnŏˈpəlē [key], city (1991 pop. 711,862), Tamil Nadu state, SE India, on the Kaveri River. It is a district administrative center and an important educational, religious, and...

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...

Cashel

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