1. Geochemical maps showing distribution and abundance of manganese in two fractions of stream-sediment concentrates, Silver City 1⁰?x 2⁰ quadrangle, New Mexico and Arizona 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, U.S. Geological Survey. English. Public. New Mexico and Arizona.