Golden Rocks, by Donna S. Anderson and Paul B. Haseman, 2021: An Open Access publication in the Mines Repository
Colorado's rock formations range from Precambrian granites exposed in the Rocky Mountains to Quaternary deposits from the latest episodes of erosion and glaciation. The State can be generally divided into (east to west):
(Fountain Valley Trail; 2011; Greg Willis, photographer.)
Geology is usually specific to a site, so make use of geographic keywords (county, quadrangle) or the names of formations in your search. Geology Top Picks lists our top geology databases. In addition, for Colorado try:
Colorado Scientific Society -- for local field guides
Field Trip Guidebook, Geological Society of America Centennial Meeting, Denver, Colorado (1988). Holden, Gregory S.
Geology of Colorado and Western Ore Deposits (1893). Lakes, Arthur.
Guide to the geology of the Golden area (1938). Van Tuyl, F. M.; Johnson, J. Harlan; Waldschmidt, W. A.; Boyd, James; Parker, Ben H. Quarterly of the Colorado School of Mines 33(3) p. 5-32.
Introduction to the geology of the Golden area, Colorado (1934). Johnson, J. Harlan. Quarterly of the Colorado School of Mines 29(4) p. 7-36.
Table Mountain lavas and associated igneous rocks near Golden, Colorado (1939). Waldschmidt, W. A. Quarterly of the Colorado School of Mines 34(3) p. 3-62.