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This collection consists of samples of the Entrada Sandstone and Pony Express Limestone from the Placerville vanadium-uranium district in southwest Colorado. The samples were collected under the direction of Harry Granger to compare some of the geochemical attributes of the Placerville district deposits to the more widespread Salt Wash hosted deposits. These samples were also used by George Breit for research to determine an age of the roscoelite (V-illite). Samples are stored in fabric bags in cardboard boxes on one wood pallet.
    map background search result map search result map Samples of the Entrada Sandstone and Pony Express Limestone from the Placerville V-U district in SW Colorado, 1983 Samples of the Entrada Sandstone and Pony Express Limestone from the Placerville V-U district in SW Colorado, 1983