city, seat (1881) of Gila county, east-central Arizona, U.S. It lies along Pinal Creek in the foothills between the Pinal and Apache mountains. Miami, its sister city, is 6 miles (10 km) west. Globe originated as a mining camp at Ramboz Peak and was moved to the present site after the discovery, in 1875, of silver on the nearby San Carlos Apache Indian Reservation. Founded a year later, the town was named for a globe-shaped piece of high-grade silver. Not silver, but copper found beneath the silver formed the basis for the city's economic development and remains the major source of income. The city's other economic activities are milling, lumbering, cattle raising, and tourism.