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  • All fields: Oil-shales--Colorado--Garfield County--1920-1930.
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    • Oil shale deposits near Rifle, Colo.

    • A man wears a tie and stands near sagebrush in a valley below the Roan Cliffs near Rifle (Garfield County), Colorado. Shows trees, scree, and layered shale on steep cliffs in the distance.
    • Beam, George L. (George Lytle), 1868-1935.
    • [between 1920 and 1930?]
    • Mount Logan

    • View of Mount Logan oil shale formations and Roan Cliffs in Garfield County, Colorado; a man is by a dirt road.
    •  
    • [between 1920 and 1930?]
    • Mount Logan

    • View of Mount Logan oil shale formations and Roan Cliffs in Garfield County, Colorado.
    •  
    • [between 1920 and 1930?]
    • Mount Logan

    • View of Mount Logan oil shale formations and Roan Cliffs in Garfield County, Colorado. Erosion cuts through rock strata.
    •  
    • [between 1920 and 1925?]

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