ammonites

Bortonian age/stage

General information
Lower boundary: equal to 43 Ma (see scale)
Upper boundary: equal to 37.2 Ma (based on Bartonian)
Continent: New Zealand
See collections within this interval
See map of collections within this interval
Key correlations
Period: Paleogene
Epoch: Eocene
Subepoch: Middle Eocene
Contained within
  • Eocene
  • Paleogene
  • Tertiary
  • Cenozoic
  • Phanerozoic
    • Previous intervals
  • Dannevirke
  • Porangan
    • Next intervals
  • Late/Upper Eocene
  • Priabonian
  • Chadronian
  • Late/Upper Chadronian
  • Middle Chadronian
  • Early/Lower Chadronian
  • Kaiatan
  • Houldjinian
  • Ergilian
  • Ulangochuian
  • MP 20
  • MP 19
  • MP 18
  • MP 17B
  • MP 17A
    • Shares base with
  • Arnold
    • Shares top with
  • Arshantan, Bartonian, Duchesnean, Irdinmanhan, MP 16, Middle Eocene, Sharamurunian
    • Overlaps with
  • Divisaderan (42.0 to 36.0 Ma)
  • Uintan (46.2 to 40.4 Ma)
  • Late/Upper Uintan (46.2 to 40.4 Ma)
  • Early/Lower Uintan (46.2 to 40.4 Ma)
  • Mustersan (48.0 to 42.0 Ma)
  • Lutetian (48.6 to 40.4 Ma)
  • MP 15 (48.6 to 40.4 Ma)
  • MP 14 (48.6 to 40.4 Ma)
  • MP 13 (48.6 to 40.4 Ma)
  • MP 12 (48.6 to 40.4 Ma)
  • MP 11 (48.6 to 40.4 Ma)
    • Appears in scale
  • New Zealand Cretaceous-Cenozoic Stages (2004)

    • Interval name: