Tiffanian

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The Tiffanian North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), typically set from 60,200,000 to 56,800,000 years BP lasting 3.4 million years. [1]

Contents

It is usually considered to overlap the Selandian and Thanetian within the Paleocene.

The Tiffanian is preceded by the Torrejonian and followed by the Clarkforkian NALMA stages.

Substages

The Tiffanian is considered to contain the following substages:

Fauna

Notable mammals [2] [3] [4]

Multituberculata - non-therian mammals

Metatheria - marsupials

Apatotheria - primitive, arboreal mammals

Condylarthra - archaic ungulates

Dinocerata - large, tusked herbivores

Eulipotyphla - insectivorous mammals

Primatomorpha - primates and relatives

Proteutheria - basal eutherians

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Willwood Formation

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References

  1. Paleobiology Database, Tiffanian
  2. "The Tiffanian Land-Mammal Age (Middle and Late Paleocene) In The Northern Bighorn Basin, Wyoming". hdl:2027.42/61362.Cite journal requires |journal= (help)
  3. Gunnell, Gregg F. (1994-03-31). "Paleocene mammals and faunal analysis of the Chappo Type Locality (Tiffanian), Green River Basin, Wyoming". Journal of Vertebrate Paleontology. 14 (1): 81–104. doi:10.1080/02724634.1994.10011540. ISSN   0272-4634.
  4. Gazin, Charles Lewis (1956). "Paleocene mammalian faunas of the Bison Basin in south-central Wyoming". Smithsonian Miscellaneous Collections. 131: 1–57.