Showing 1 - 5 results of 5 for search 'Oregon. Department of Geology and Mineral Industries' Narrow Search
  1. Magnetometer surveys on black sands of the Oregon coast [electronic resource] /
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  2. Oregon's gold placers.
    Published 1968
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  3. Oregon gold & gems maps : then & now /
    Published 1975
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  4. Oregon gold/silver & gems maps, then and now : gold/silver, agate, apache tears, bloodstone ... thunder eggs, tourmaline, jade.
    Oregon goldsilver & gems maps then and now
    goldsilver agate apache tears bloodstone thunder eggs tourmaline jade
    Map
    Published 2000
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  5. Geologic map of the Greater Portland Metropolitan Area and surrounding region, Oregon and Washington [federal doc] /
    Published 2020
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