Tiffanian




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]


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:



  • Ti6: Lower boundary source of the base of the Tiffanian (approximate).

  • Ti5 Lower boundary source of the base of the Tiffanian (approximate) and upper boundary source of the base of the Clarkforkian (approximate).

  • Ti4: Lower boundary source of the base of the Tiffanian (approximate) and upper boundary source of the base of the Clarkforkian (approximate).

  • Ti3: Lower boundary source of the base of the Tiffanian (approximate) and upper boundary source of the base of the Clarkforkian (approximate).

  • Ti2: Lower boundary source of the base of the Tiffanian (approximate) and upper boundary source of the base of the Clarkforkian (approximate).

  • Ti1: Upper boundary source of the base of the Clarkforkian (approximate)





References





  1. ^ Paleobiology Database, Tiffanian












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