. The Badland formations of the Black Hills region. Geology; Geology, Stratigraphic; Vertebrates, Fossil. Figure 1. Head of Mesohippus bairdi, an Oligocene three-toed horse. Scott, Figure 2. Head of Hyracodon nebraseensis, an Oligocene rhinoceros. Scott, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original O'Harra, Cleophas C. (Cleophas Cisney), 1866-1935. Rapid City, S. D. [The Daily Journal]

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeology, bookyear1910