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  • All fields: Cliffs--Colorado--Rio Blanco County--1900-1920.
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    • Shale ledge at the retort of Cont. Oil Shale Mining Co., Rio Blanco Colo. [?]

    • Shale ledge at the retort of Cont. Oil Shale Mining Co., Rio Blanco Colo. [?]

    • Close-up view of layered shale cliffs in Rio Blanco County, Colorado. Shows steep rock walls and scattered stones on the ground in an area identified as near the Continental Oil Shale Mining Company retort.

    • Oil-shales--Colorado--Rio Blanco County--1900-1920.; Rio Blanco County (Colo.)--1900-1920.; Cliffs--Colorado--Rio Blanco County--1900-1920.

    • [between 1900 and 1920?]
    • Continental Oil Shale and Refining Co., Rio Blanco Co.

    • Continental Oil Shale and Refining Co., Rio Blanco Co.

    • View of Continental Oil Shale and Refining Company corrugated metal-sided buildings and a brick retort in Rio Blanco County, Colorado. A sign on timber scaffolding near a ladder reads: "The Colorado Continuous Retort, Patent applied for," and a...

    • Oil-shale industry--Colorado--Rio Blanco County--1900-1920.; Oil-shales--Colorado--Rio Blanco County--1900-1920.; Rio Blanco County (Colo.)--1900-1920.; Cliffs--Colorado--Rio Blanco County--1900-1920.; Refineries--Colorado--Rio Blanco...

    • [between 1900 and 1920?]
    • Plant of the Continental Oil Shale Mining & Refining Co., Rio Blanco [County], Colo.

    • Plant of the Continental Oil Shale Mining & Refining Co., Rio Blanco [County], Colo.

    • View of a Continental Oil Shale Mining and Refining Company plant on a hillside near layered shale cliffs in Rio Blanco County, Colorado. Shows a brick retort with timber scaffolding and ladders and a sign that reads: "The Colorado Continuous...

    • Oil-shale industry--Colorado--Rio Blanco County--1900-1920.; Oil-shales--Colorado--Rio Blanco County--1900-1920.; Rio Blanco County (Colo.)--1900-1920.; Cliffs--Colorado--Rio Blanco County--1900-1920.; Refineries--Colorado--Rio Blanco...

    • [between 1900 and 1920?]

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