. The age of mammals in Europe, Asia and North America. Mammals, Fossil; Paleontology. OLIGOCENE OF EUROPE, NORTH AFRICA, AND NORTH AMERICA 211. By permission of the Geological Survey. Fig. 99. — Oligocene, Lower Miocene and Pleistocene exposures of South Dakota, Nebraska, and eastern Wyoming. After Darton and Thomson. Oblique lines = Titanotherium Zone, Chadron Formation. Dots = Oreodon and Leptauchenia Zones, Brule Formation. Horizontal lines = Prome- rycochoerus and MerycochaTUs Zones, Arikaree Formation. Vertical lines = Pleistocene. Exten- sive Upper Miocene and Pliocene exposures om
. The age of mammals in Europe, Asia and North America. Mammals, Fossil; Paleontology. OLIGOCENE OF EUROPE, NORTH AFRICA, AND NORTH AMERICA 211. By permission of the Geological Survey. Fig. 99. — Oligocene, Lower Miocene and Pleistocene exposures of South Dakota, Nebraska, and eastern Wyoming. After Darton and Thomson. Oblique lines = Titanotherium Zone, Chadron Formation. Dots = Oreodon and Leptauchenia Zones, Brule Formation. Horizontal lines = Prome- rycochoerus and MerycochaTUs Zones, Arikaree Formation. Vertical lines = Pleistocene. Exten- sive Upper Miocene and Pliocene exposures 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 Osborn, Henry Fairfield, 1857-1935. New York, The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectpaleontology, bookyea
