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  • Cited by 10
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    This chapter has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Korth, William W. 2018. Review of the marsupials (Mammalia: Metatheria) from the late Paleogene (Chadronian–Arikareean: late Eocene–late Oligocene) of North America. PalZ, Vol. 92, Issue. 3, p. 499.

    Samuels, Joshua X. Albright, L. Barry and Fremd, Theodore J. 2015. The last fossil primate in North America, new material of the enigmaticEkgmowechashalafrom the Arikareean of Oregon. American Journal of Physical Anthropology, Vol. 158, Issue. 1, p. 43.

    Czaplewski, Nicholas J. and Morgan, Gary S. 2015. A late-surviving apatemyid (Mammalia: Apatotheria) from the latest Oligocene of Florida, USA. PeerJ, Vol. 3, Issue. , p. e1509.

    Best, Myron G. Christiansen, Eric H. Deino, Alan L. Gromme, Sherman Hart, Garret L. and Tingey, David G. 2013. The 36–18 Ma Indian Peak–Caliente ignimbrite field and calderas, southeastern Great Basin, USA: Multicyclic super-eruptions. Geosphere, Vol. 9, Issue. 4, p. 864.

    Tedford, Richard H. Wang, Xiaoming and Taylor, Beryl E. 2009. Phylogenetic Systematics of the North American Fossil Caninae (Carnivora: Canidae). Bulletin of the American Museum of Natural History, Vol. 325, Issue. , p. 1.

    LOOPE, DAVID B. MASON, JOSEPH A. BAO, HUIMING KETTLER, RICHARD M. and ZANNER, C. WILLIAM 2005. Deformation structures and an alteration zone linked to deposition of volcanogenic sulphate in an ancient playa (Oligocene of Nebraska, USA). Sedimentology, Vol. 52, Issue. 1, p. 123.

    Morgan, Gary S. and Lucas, Spencer G. 2003. Radioisotopically-calibrated oreodonts (Mammalia: Artiodactyla) from the Late Oligocene of southwestern New Mexico. Journal of Vertebrate Paleontology, Vol. 23, Issue. 2, p. 471.

    Albright, L. Barry 2001. J. Alan Holman: Fossil Snakes of North America: Origin, Evolution, Distribution, Paleoecology. Journal of Vertebrate Paleontology, Vol. 21, Issue. 1, p. 201.

    Albright, L. Barry 1998. New genus of tapir (Mammalia: Tapiridae) from the Arikareean (earliest Miocene) of the Texas Coastal Plain. Journal of Vertebrate Paleontology, Vol. 18, Issue. 1, p. 200.

    Walsh, Stephen L. 1998. Fossil datum and paleobiological event terms, paleontostratigraphy, chronostratigraphy, and the definition of Land Mammal “Age” boundaries. Journal of Vertebrate Paleontology, Vol. 18, Issue. 1, p. 150.

  • Print publication year: 1996
  • Online publication date: July 2010

15 - The Whitneyan-Arikareean transition in the High Plains



We bring together lithostratigraphic, biostratigraphic, and magnetostratigraphic data from Nebraska and South Dakota to detail faunal change between 28-30 Ma in medial Oligocene time. This span records the transition from the White River chronofauna to the new assemblages that characterize the younger part of the Arikareean “age.” Although a regional disconformity of approximately a half-million year duration breaks the biostratigraphic sequence, the fossil record is reasonably continuous and mostly confined to the eolian facies. Between 28-30 Ma the White River chronofauna experienced significant enrichment in autochthonous clades especially hesperocyonine canids, oreodonts, camels, hypertragulids, and burrowing castoid and geomyoid rodents. Few allochthonous taxa are encountered so that the chronofauna was enriched without marked immigration or extinction. At approximately 28 Ma most of the White River genera leave the record, thus terminating the chronofauna. The fauna that emerges contains representatives of autochthonous lineages, some of which appeared during the enrichment phase of the White River chronofauna. In addition there are allochthonous genera that represent taxa new to midcontinental North America. The better resolved and calibrated fossil record allows re-examination of the definition and characterization of the beginning of the Arikareean mammal “age.” We propose that the initiation of the Arikareean Mammal “age” is signaled by the first appearance of taxa that enrich the White River chronofauna in latest Chron C11r and earliest Chron C11n (about 30 Ma).

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The Terrestrial Eocene-Oligocene Transition in North America
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