Thornton, city (1990 pop. 55,031), Adams co., NE Colo., a residential and industrial suburb of Denver ; inc. 1956. Industries include oil and gas development and the production of computer graphics systems, wood products, coffee and tea, building components, infant furniture, automobile accessories, sheet metal, air distribution and pneumatic equipment, instrumentation recorders, and space systems. Thornton has grown tremendously along with the rapid development of the Denver metropolitan area.
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