— Connecticut Valley, Connecticut - Trap-rock Quarries Along Highways U.S. 7, U.S. 44 (From Mining and Mineral Operations in the United States: A Visitor's Guide, by Staff, Bureau of Mines, Area Mineral Resource Offices, U. S. Department of the Interior, Bureau of Mines, 1967, pp. 18.) "The past mining glories of Connecticut are now (circa …