LITERATURE CITED
- Berggren , W. A. , Kent , D. V. , Swisher , C. C. III and Aubry , M.-P. 1995 . “ A revised Cenozoic Geochronology and Chronostratigraphy; ” . In Geochronology, Time-scales and Global Stratigraphie Correlations: A Unified Framework for an Historical Geology. Society of Stratigraphie Geology, Special Publication 54 Edited by: Berggren , W. A. , Kent , D. V. , Aubry , M.-P. and Hardenbol , J. 129 – 212 .
- Emry , R. J. , Russell , L. S. and Bjork , P. R. 1987 . “ The Chadronian, Orellan, and Whitneyan North American land mammal ages; ” . In Cenozoic Mammals of North America: Geochronology and Biostratigraphy Edited by: Woodburne , M. O. 118 – 152 . Berkeley : University of California Press .
- Flynn , J. J. 1986 . Correlation and geochronology of middle Eocene strata from the western United States. Palaeogeography . Palaeoclimatology and Palaeoecology , 55 : 335 – 406 .
- Prothero , D. R. and Berggren , W. A. 1992 . Eocene-Oligocene Climatic and Biotic Evolution 568 Princeton : Princeton University Press .
- Prothero , D. R. and Heaton , T. H. 1996 . Faunal stability during the Early Oligocene climatic crash. Palaeogeography . Palaeoclimatology and Palaeoecology , 127 : 257 – 283 .
- Scott , W. B. , Jepsen , G. L. and Wood , A. E. 1936–1941 . The mammalian fauna of the White River Oligocene, Parts I-V . Transactions of the American Philosophical Society , 28 : 1 – 980 .
- Woodburne , M. O. and Swisher , C. C. III . 1995 . “ Land mammal high-resolution geochronology, intercontinental overland dispersals, seal level, climate, and vicariance; ” . In Geochronology, Time-scales and Global Stratigraphie Correlations: A Unified Framework for an Historical Geology. Society of Stratigraphie Geology, Special Publication 54 Edited by: Berggren , W. A. , Kent , D. V. , Aubry , M.-P. and Hardenbol , J. 337 – 364 .