1. Map showing Quaternary and Pliocene faults in the Silver City 1⁰?x 2⁰?quadrangle and the Douglas 1⁰?x 2⁰?quadrangle, southeastern Arizona and southwestern New Mexico Yale Public content 1986. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Branch of Distribution. English. Public. Arizona and New Mexico. Pliocene and Quaternary.