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sediment

(Encyclopedia) sediment, mineral or organic particles that are deposited by the action of wind, water, or glacial ice. These sediments can eventually form sedimentary rocks (see rock). Sediments…

Cambrian period

(Encyclopedia) Cambrian period [Lat. Cambria=Wales], first period of the Paleozoic geologic era (see Geologic Timescale, tablegeologic timescale, table) extending from approximately 570 to 505…

Springsteen, Bruce Frederick

(Encyclopedia) Springsteen, Bruce Frederick, 1949–, American singer, guitarist, and songwriter, nicknamed “The Boss,” b. Long Branch, N.J. Springsteen established himself as a singer and songwriter,…

Rephidim

(Encyclopedia) RephidimRephidimrĕfˈĭdĭm, rēfĭdˈĭm [key], in the Bible, unlocated place in Sinai where Moses struck the rock and brought forth water.

Ellora

(Encyclopedia) ElloraElloraĕlōˈrə [key], village, E central Maharashtra state, India. Extending more than 1 mi (1.6 km) on a hill are 34 rock and cave temples (5th–13th cent.), most of them Hindu but…

Hooker, John Lee

(Encyclopedia) Hooker, John Lee, 1917–2001, American blues singer and guitarist, b. near Clarksdale, Miss. From a cotton-sharecropping family, he learned the blues from his stepfather and various…

borer

(Encyclopedia) borer, name applied to various animals that are injurious because of their ability to penetrate plant or animal tissues. Among insects, some borers are beetles, e.g., the flatheaded…

waterfall

(Encyclopedia) waterfall, a sudden unsupported drop in a stream. It is formed when the stream course is interrupted as when a stream passes over a layer of harder rock—often igneous—to an area of…