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Physical Features: Hilly terrain southwest of Fort Worth; Brazos River, Paluxy River; Squaw Creek Reservoir; gray, dark, alluvial soils; second-smallest county.

Economy: Nuclear power plant, tourism.

History: Wichita, Tonkawa area; Comanches later. Anglo-Americans arrived in the 1850s. County created in 1875 as Somerville County from Hood County, organized the same year. Spelling was changed in 1876; named for Republic of Texas Gen. Alexander Somervell.

Race/Ethnicity: (In percent) Anglo, 77.8; Black, 1.3; Hispanic, 18.1; Asian, 1.1; Other, 1.7; Two or more races, 2.2.

Vital Statistics, annual: Births, 77; deaths, 98; marriages, 81; divorces, 22.

Recreation: Fishing, hunting; unique geological formations; dinosaur tracks in Dinosaur Valley State Park; Glen Rose Big Rocks Park; Fossil Rim Wildlife Center; nature trails, museums; exposition center; Paluxy Pedal bicycle ride in October.

Minerals: Sand, gravel, silica, natural gas.

Agriculture: Cattle, hay. Market value $4.1 million. Hunting leases important.

GLEN ROSE (2,817) county seat; nuclear power plant, tourism, farm trade center; hospital; Hill College branch.

Other towns include: Nemo (56); Rainbow (121).

Theropod tracks in rock at Dinosaur Valley State Park. Photo by Gary S. Hickinbotham.