 Brine from wells that tapped into halite (common salt) beds in the Salina shale near Tully, New York, 15 miles south of the city, was developed in the 19th century.It is the north-flowing brine from Tully that is the source of salt for the "salty springs" found along the shoreline of Onondaga Lake.The rapid development of this industry in the 18th and 19th centuries led to the nicknaming of this area as "The Salt City".