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  • Lower to middle Eocene volcanic rocks -- Lower unit -- Upper unit -- Alkalic basalt -- Porphyritic augite basalt -- Feldspar-phyric basalt -- Picrite-basalt -- Tholeiitic basalt -- Chemical data -- Upper ...
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  • Introduction -- History -- California gold rush -- Placer mining in southern Oregon -- Stream placers -- Beach placers -- Offshore beds -- Ancient terraces -- Lode mining in southern Oregon -- Benton mine ...
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  • Fulgurites from Mount Thielsen, Oregon / William B. Purdom -- Zoning in an ash flow of the Danforth Formation, Harney County, Oregon / Ernest H. Lund.
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  • Introduction -- Distribution of basaltic tuff landforms -- Definition of terms -- Maar -- Dry maar or ubehebe -- Tuff cone or tuff ring -- Diatreme -- Maar or tuff ring field identification -- General ...
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  • Ground water in the Orchard syncline, Wasco county, Oregon / R. C. Newcomb -- Gold and silver assay of a manganese nodule / William E. Caldwell -- Oregon mineral industry holds price line / Ralph S. Ma...
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  • Introduction -- Coastal physiography and general geology -- Landslide characteristics -- Landslide morphology -- Landslide mechanism -- Landslide classification -- Distribution of landslides -- Tillamook ...
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