ammonites

Graybullian subage/stage

General information
Lower boundary: after 55.8 Ma (based on Ypresian)
Upper boundary: before 50.3 Ma (based on Wasatchian)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Paleogene
Epoch: Eocene
Subepoch: Early/Lower Eocene
Stage: Ypresian
10 million year bin: Cenozoic 2
Contained within
  • Wasatchian
  • Dannevirke
  • Paleogene
  • Tertiary
  • Cenozoic
  • Phanerozoic
    • Previous intervals
  • Paleocene
  • Late/Upper Paleocene
  • Thanetian
  • Clarkforkian
  • Cf3
  • Cf2
  • Cf1
  • Riochican
  • Teurian
  • Gashatan
  • MP 6
  • MP 1 - 5
    • Next intervals
  • Bridgerian
  • Twinbuttean
  • Blacksforkian
  • Gardnerbuttian
    • Shares base with
  • Bumbanian, Casamayoran, Early/Lower Eocene, Eocene, MP 10, MP 7, MP 8 + 9, Waipawan, Ypresian
    • Overlaps with
  • Mangaorapan (53.0 to 49.5 Ma)
  • Lostcabinian (55.8 to 50.3 Ma)
  • Lysitean (55.8 to 50.3 Ma)
  • Sandcouleean (55.8 to 50.3 Ma)
    • Appears in scale
  • North American Mammal Subages/Zones: Puercan - Uintan (1987)

    • Interval name: