Specimen Number28-6-060Alternate NumberJR-97-120Commentsfrom Crowe research collection; J. Rosdeutscher MS materialsIn Teaching CollectionNoMineral(s)k-sparplagioclasepyritequartzField Notesgranite w/ pervasive diss. fg pyRock NamegraniteDistrictCripple CreekMineGrassy ValleyGeo-LocationDDHGVC-4 1134ft.Deposit TypeDiatremeGeo-Coords[1] Reference MaterialRosdeutscher, J.A., 1999, Geology and Stable Isotope Geochemistry of the Grassy Valley Au Deposit, Cripple Creek District, Colorado: Evidence for Magmatic Fluids; University of Georgia MS thesis, 76 p.
28-6-060: granite - Cripple Creek District - Grassy Valley Mine. Franklin College Collections, accessed 13/06/2026, https://digitalcollections.franklin.uga.edu/nodes/view/35952