Skip to main content Accesibility Help
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 9
  • Cited by
    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.

    Divay, Julien D. and Murray, Alison M. 2015. The late Eocene–early Oligocene ichthyofauna from the Eastend area of the Cypress Hills Formation, Saskatchewan, Canada. Journal of Vertebrate Paleontology, Vol. 35, Issue. 4, p. e956877.

    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.

    Vilela, Júlio F. Mello, Beatriz Voloch, Carolina M. and Schrago, Carlos G. 2014. Sigmodontine rodents diversified in South America prior to the complete rise of the Panamanian Isthmus. Journal of Zoological Systematics and Evolutionary Research, Vol. 52, Issue. 3, p. 249.

    Gunnell, Gregg F. Simons, Elwyn L. and Seiffert, Erik R. 2008. New bats (Mammalia: Chiroptera) from the late Eocene and early Oligocene, Fayum Depression, Egypt. Journal of Vertebrate Paleontology, Vol. 28, Issue. 1, p. 1.

    Ferrusquía-Villafranca, Ismael 2006. The first Paleogene mammal record of Middle America:Simojovelhyus pocitosense(Helohyidae, Artiodactyla). Journal of Vertebrate Paleontology, Vol. 26, Issue. 4, p. 989.

    Worley-Georg, Marie P. and Eberle, Jaelyn J. 2006. Additions to the Chadronian Mammalian fauna, Florissant Formation, Florissant Fossil Beds National Monument, Colorado. Journal of Vertebrate Paleontology, Vol. 26, Issue. 3, p. 685.

    Gunnell, Gregg F. and Simmons, Nancy B. 2005. Fossil Evidence and the Origin of Bats. Journal of Mammalian Evolution, Vol. 12, Issue. 1-2, p. 209.

    Kelly, Thomas S. and Whistler, David P. 1998. A new eomyid rodent from the Sespe Formation of Southern California. Journal of Vertebrate Paleontology, Vol. 18, Issue. 2, p. 440.

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

12 - Eocene-Oligocene faunas of the Cypress Hills Formation, Saskatchewan



The Cypress Hills Formation of southwestern Saskatchewan preserves fossil mammals of Uintan (middle Eocene) to Hemingfordian (early Miocene) age. Deposition was nearly continuous during this interval, and the widely held belief that a limited period of Uintan sedimentation on the Swift Current Plateau was followed by Chadronian sedimentation throughout the area, the two separated by a period of non-deposition, is incorrect. Eocene assemblages from the Cypress Hills Formation have aided in identifying the profound middle Eocene faunal turnover as taxonomic displacement, and in documenting the greatly increased faunal provinciality of the Duchesnean. Late Eocene and Oligocene assemblages, many of them newly discovered, provide a rare opportunity to trace the evolution and eventual replacement of the White River Chronofauna in the northern Great Plains. The classic concept of the “Cypress Hills Oligocene” is based on Chadronian to Hemingfordian specimens collected from a large geographical area, and must be abandoned in favor of a model involving many successive local faunas. The local fauna most similar to the “Cypress Hills Oligocene” of the literature is the middle Chadronian (late Eocene) Calf Creek Local Fauna.


The Cypress Hills Formation of the Swift Current and Cypress Hills Plateaus (Figs. 1, 2), southwestern Saskatchewan, preserves a series of mammalian paleofaunas representing middle Eocene to early Miocene time. Uintan to Chadronian local faunas in the Swift Current Plateau and Chadronian to Hemingfordian assemblages in the Cypress Hills Plateau furnish a unique opportunity to trace the evolution of mammals in the northern Great Plains through the period of profound middle Eocene faunal replacement, much of the history of the White River Chronofauna, and into the beginnings of the Miocene Chronofauna.

Recommend this book

Email your librarian or administrator to recommend adding this book to your organisation's collection.

The Terrestrial Eocene-Oligocene Transition in North America
  • Online ISBN: 9780511665431
  • Book DOI:
Please enter your name
Please enter a valid email address
Who would you like to send this to *