RN-06 Summary of the Geology, Gold, and Heavy Mineral Placer Deposits of the Iron Springs Divide Area, Moffat County, Colorado RN-06 Summary of the Geology, Gold, and Heavy Mineral Placer Deposits of the Iron Springs Divide Area, Moffat County, Colorado
RS-48 Beach placer mineral deposits along localized paleoshorelines of the Western Interior Seaway RS-48 Beach Placer Mineral Deposits along Localized Paleoshorelines of the Western Interior Seaway, Upper Cretaceous Fox Hills Sandstone, Eastern Denver Basin, Colorado