ammonites

Clarkforkian age/stage

General information
Lower boundary: equal to 56.8 Ma (see scale)
Upper boundary: equal to 55.8 Ma (based on Thanetian)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Paleogene
Epoch: Paleocene
Subepoch: Late/Upper Paleocene
Stage: Thanetian
10 million year bin: Cenozoic 1
Contained within
  • Dannevirke
  • Paleogene
  • Tertiary
  • Cenozoic
  • Phanerozoic
    • Previous intervals
  • Tiffanian
  • Ti6
  • Ti5
  • Ti4
  • Ti3
  • Ti2
  • Ti1
    • Next intervals
  • Eocene
  • Early/Lower Eocene
  • Ypresian
  • Wasatchian
  • Lostcabinian
  • Lysitean
  • Graybullian
  • Sandcouleean
  • Casamayoran
  • Waipawan
  • Bumbanian
  • MP 10
  • MP 8 + 9
  • MP 7
    • Contains
  • Cf1, Cf2, Cf3
    • Shares top with
  • Gashatan, Late/Upper Paleocene, MP 1 - 5, MP 6, Paleocene, Riochican, Teurian, Thanetian
    • Appears in scales
  • North American Land Mammal Ages (2000)
  • North American Provincial Ages (1990)
  • North American Mammal Ages (1987)

    • Interval name: