1. Trace-element geochemical maps of the western three-quarters of the Pueblo 1⁰ x 2⁰ quadrangle, south-central Colorado Yale Public content 1990. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Colorado and Pueblo Region.