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Starved Rock

(Encyclopedia)Starved Rock, cliff, 140 ft (43 m) high, overlooking the Illinois River between La Salle and Ottawa, N Ill. Legend says that in the 18th cent. the Ottawas drove a band of Illinois onto the cliff, wher...

igneous rock

(Encyclopedia)igneous rock: see rock.

Percé Rock

(Encyclopedia)Percé Rock pĕrsāˈ [key], E Que., Canada, just off the tip of the Gaspé Peninsula. It is a massive rock (1,420 ft/433 m long; c.300 ft/90 m wide; and 290 ft/88 m at the highest point), rising shee...

rock crawler

(Encyclopedia)rock crawler, name applied to the slender, wingless insects of the family Grylloblattidae in the order Orthoptera. They have long antennae and range in length from 1⁄2 to 1 in. (15–30 mm). Rock cr...

sedimentary rock

(Encyclopedia)sedimentary rock: see rock; sediment. ...

early man

(Encyclopedia)early man: see human evolution.

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 hogs. Electroni...

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 the chief city ...

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, textiles, and f...

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 natural trona min...