ammonites

Rexroadian subage/stage

General information
Lower boundary: equal to 4.9 Ma (based on Blancan)
Upper boundary: before 1.8 Ma (based on Blancan)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
10 million year bin: Cenozoic 6
Contained within
  • Blancan
  • Wanganui
  • Cenozoic
  • Phanerozoic
    • Previous intervals
  • Hemphillian
  • Late/Upper Hemphillian
  • late Early Hemphillian
  • early Early Hemphillian
  • MN 13
  • Baodean
    • Next intervals
  • Irvingtonian
  • Cudahyan
  • Sappan
    • Contains
  • Chapadmalalan, Gelasian, Late/Upper Pliocene, MN 15, MN 16, MN 17, Mangapanian, Piacenzian, Villanyian, Waipipian
    • Shares base with
  • MN 14, Yushean
    • Overlaps with
  • Calabrian (1.806 to 0.781 Ma)
  • Nukumaruan (2.4 to 1.63 Ma)
  • Quaternary (2.588 to 0.0 Ma)
  • Pleistocene (2.588 to 0.012 Ma)
  • Nihewanian (2.588 to 0.012 Ma)
  • Early/Lower Pleistocene (2.588 to 0.781 Ma)
  • Uquian (3.0 to 1.2 Ma)
  • "Senecan" (4.9 to 1.8 Ma)
  • Pliocene (5.332 to 2.588 Ma)
  • Ruscinian (5.332 to 3.2 Ma)
  • Early/Lower Pliocene (5.332 to 3.6 Ma)
  • Zanclean (5.332 to 3.6 Ma)
  • Opoitian (5.332 to 3.6 Ma)
  • Montehermosan (6.8 to 4.0 Ma)
  • Neogene (23.03 to 2.588 Ma)
  • Tertiary (65.5 to 2.588 Ma)
    • Appears in scale
  • North American Mammal Subages/Zones: Arikareean - Rancholabrean (1987)

    • Interval name: