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Rock Falls
(Encyclopedia) Rock Falls, city (1990 pop. 9,654), Whiteside co., NW Ill., on the Rock River opposite Sterling; inc. 1867. It is an industrial center in a farm region with corn, soybeans, cattle, and…Rock Hill
(Encyclopedia) Rock Hill, city (1990 pop. 41,643), York co., N S.C.; inc. 1870. An important textile center, it also has industries producing paper, glass, metal products, pharmaceuticals, chemicals…rock rabbit
(Encyclopedia) rock rabbit: see pika.Rock River
(Encyclopedia) Rock River, c.285 mi (460 km) long, rising in SE Wis. and flowing SW through NW Ill. to the Mississippi River near Rock Island. It flows through a fertile farm area. Rockford, Ill., is…rock salt
(Encyclopedia) rock salt: see sodium chloride.Rock Springs
(Encyclopedia) Rock Springs, city (1990 pop. 19,050), alt. c.6,270 ft (1,910 m), Sweetwater co., SW Wyo., on Bitter Creek; inc. 1888. It is a cattle and sheep shipping point and the center of large…rock temple
(Encyclopedia) rock temple: see temple.Rock Island, city, United States
(Encyclopedia) Rock Island, city (1990 pop. 40,552), seat of Rock Island co., NW Ill., on the Mississippi and Rock rivers, adjacent to Moline and opposite Davenport, Iowa; inc. 1841. These three…metamorphism
(Encyclopedia) metamorphism, in geology, process of change in the structure, texture, or composition of rocks caused by agents of heat, deforming pressure, shearing stress, hot, chemically active…granite
(Encyclopedia) granite, coarse-grained igneous rock of even texture and light color, composed chiefly of quartz and feldspars. It usually contains small quantities of mica or hornblende, and minor…