The Terrestrial Eocene-Oligocene Transition in North America
Donald R. Prothero, Robert J. Emry
Cambridge University Press, Sep 29, 2005 - Science - 708 pages
During the transition from the Eocene to the Oligocene epochs, the mild tropical climates of the Paleocene and early Eocene were replaced by modern climatic conditions and extremes, including glacial ice in Antarctica. The best terrestrial record of the Eocene-Oligocene transition is found in North America, including the spectacular cliffs and spires of the Big Badlands National Park, in South Dakota. The first part of this book summarises the latest information in dating and correlation of the strata of late middle Eocene through early Oligocene age in North America, including the latest insights from argon/argon dating and magnetic stratigraphy. The second part reviews almost all the important terrestrial reptiles and mammals found near the Eocene-Oligocene boundary in the White River chronofauna, from the turtles, snakes and lizards to the common rodents, carnivores, artiodactyls, and perissodactyls. This is the first comprehensive treatment of these rocks and fossils in over sixty years and will be an invaluable resource to vertebrate palaeontologists, geologists, mammalogists and evolutionary biologists.
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AMNH assemblage beds Berggren biostratigraphy Bridgerian Brule Formation bullae Califomia Canyon Cenozoic Chadron Chron Conglomerate Cope correlation County Creek culbertsoni Cypress Hills Daphoenus dentary Dinictis Duchesnean early Arikareean early Uintan Emry Eocene Eocene-Oligocene F:AM Falkenbach fauna ﬁeld ﬁg ﬁrst Flagstaff Rim Flynn fossil Friars Formation genera genus Geological Hesperocyon Hoplophoneus Ischyromys Joumal late Eocene late Uintan Leidy Leptomeryx Lillegraven lingual localities lower magnetic magnetozone mammalian mammals mandible Member Merycoidodon Mesoreodon middle Eocene Miniochoerus Miocene Mission Valley Formation molars Montana Museum of Natural Natural History Nebraska North America occur Oligocene Orellan oreodonts Paleogene paleomagnetic Paleontology Pipestone Springs Pogonodon posterior premolars Quarry Ranch ridge River Formation rodents samples San Diego sandstone Saskatchewan Schultz and Falkenbach SDSM Sespe Formation signiﬁcant skull South Dakota species specimens Storer stratigraphic taxa taxon Tedford teeth Tertiary Texas UCMP Uintan upper vertebrate Washakie Formation westem White River Whitneyan Wilson Wyoming