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    • Chimney Rock model

    • Chimney Rock (Neb.); Geology--Nebraska; Rock formations--Nebraska; Nebraska Western Trails Project NSHS
    • Abstract Chimney Rock is mainly composed of Brule clay, not ôrock,ö with horizontal layers of volcanic ash and sandstone. The soft clay erodes easily, while the hard sandstone does not. The presence of the protective sandstone cap may explain...
    • Chimney Rock model

    • Chimney Rock (Neb.); Geology--Nebraska; Rock formations--Nebraska; Nebraska Western Trails Project NSHS
    • Abstract Chimney Rock is mainly composed of Brule clay, not ôrock,ö with horizontal layers of volcanic ash and sandstone. The soft clay erodes easily, while the hard sandstone does not. The presence of the protective sandstone cap may explain...
    • Labonte Creek

    •  
    • Located 10 miles south of present-day Douglas, Wyoming, this first step into the foothills of the Rocky Mountains was especially rugged. On August 12, 1866, William Henry Jackson recalled that he had an especially hard time getting his ox-drawn...

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