Includes bibliographical references (pages 67-73).
IGC field trip T129: mineral deposits and geology of central Colorado / Bruce Bryant, David W Beaty -- Central City and Idaho Springs districts, front range, Colorado / P K Sims -- The Aspen mining district / Ralph J Stegen, David W Beaty, Bruce Bryant, Tommy B Thompson -- The Gilman mining district / David W Beaty, C W Naeser, C G Cunningham, G P Landis -- The porphyry molybdenite deposits at climax, Colorado / SR Wallace, Geoffrey G Snow -- The Leadville mining district / Tommy B Thompson, David W Beaty -- Geology and ore deposits of the Creede mining district, Colorado / Geoffrey S Plumlee, Stanton W Caddey, Craig B Byington -- The Cripple Creek district / Tommy B Thompson