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Filters: Tags: Elderkin R.L. Collection (X) > partyWithName: U.S. Geological Survey (X)

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Natural size specimen of oil shale. Oil shale is actually a marlstone. The darker the color the higher the shale oil content. Colorado.n.d.
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Geokinetics site where they are developing a true insitu shale oil recovery method. The piping over the retort is visible in right center. Uintah County, Utah. August 27, 1981.
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Oblique aerial view of oil shale prototype tract C-b with ventilation/escape shaft headframe in foreground. Rio Blanco County, Colorado. August 27, 1981.
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Oblique aerial view of Union's oil shale operation, the main mine bench is in the background. The foreground is probably the site of its ventilation tunnel. Garfield County, Colorado. August 27, 1981.
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Oblique aerial view of the production shaft and service shaft headframes on oil shale prototype tract C-b. Rio Blanco County, Colorado. August 27, 1981.
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Battlement Mesa, under construction, Colorado River on the right. Garfield County, Colorado. August 27, 1981.
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Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. May 31, 1978.
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Big Squirt rainbird sprinkler irrigation system being used to dispose of excess mine water on oil shale prototype tract C-b. Rio Blanco County, Colorado. August 27, 1981.
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Aerial view of site of Geokinetics true in situ test. Piping and boreholes for retort rubblization visible at lower left. Note ground cracks where rubblization has uplifted the ground surface. Uintah County, Utah. August 27, 1981.