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Filters: Date Range: {"choice":"year"} (X) > partyWithName: Purrington, Chester Wells (X) > partyWithName: U.S. Geological Survey (X) > Types: Map Service (X)

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View from the Bullion Tunnel, looking south across the head of the San Miguel Valley. Shows the Unconformity between the San Miguel and underlying formations. Telluride Quadrangle. Dolores County, Colorado. 1896.


    map background search result map search result map Fossil Point. Alaska.1896. View from the Bullion Tunnel, looking south across the head of the San Miguel Valley. Dolores County, Colorado. 1896. View from the Bullion Tunnel, looking south across the head of the San Miguel Valley. Dolores County, Colorado. 1896. Fossil Point. Alaska.1896.