1. Mineral resource potential of the Silver City 1⁰ x 2⁰ quadrangle, New Mexico-Arizona : Map G - Iron, nickel, and cobalt resource potential Yale Public content 1984. 2002-06-01T04:00:00Z. 2023-09-14T19:43:15Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. New Mexico and Arizona.