• Trenton escarpment

    Thwaites, F.T

    Photograph showing a view toward an escarpment in theTrenton limestone southeast of Hudson, Wisconsin.

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  • View from St. Lawrence hill

    Thwaites, F.T

    Panoramic set of two photographs showing a view from a hill of St. Lawrence limestone five miles north of Wheeler, Wisconsin.

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  • Mammillary topography

    Hotchkiss, W.O

    Photograph showing "mammillary" topography near the edge of the Wisconsin terminal, about 3 miles north of New Richmond.

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  • Lower Magnesian escarpment

    Thwaites, F.T

    Photograph showing a view toward an escarpment in the Lower Magenesian limestone south of Hudson, Wisconsin, on a fault line.

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