ammonites

Riphean period

General information
Lower boundary: equal to 1650 Ma (based on Burzyan)
Upper boundary: equal to 635 Ma (based on )
Continent: global
See collections within this interval
See map of collections within this interval
Contained within
  • Proterozoic
    • Previous intervals
  • Hadean
  • Early/Lower Imbrian
    • Next intervals
  • Sinian
  • Vendian
  • Varanger
  • Ediacaran
  • Nyborg
    • Contains
  • Calymmian, Ectasian, Mesoproterozoic, Stenian, Sturtian, Tonian, Yurmatin
    • Shares base with
  • Animikean, Burzyan, Huronian, Isuan, Randian, Swazian
    • Shares top with
  • , Cryogenian, Karatau, Smalfjord
    • Overlaps with
  • Neoproterozoic (1000.0 to 542.0 Ma)
  • Paleoproterozoic (2500.0 to 1600.0 Ma)
  • Statherian (2500.0 to 1600.0 Ma)
  • Orosirian (2500.0 to 1600.0 Ma)
  • Rhyacian (2500.0 to 1600.0 Ma)
  • Siderian (2500.0 to 1600.0 Ma)
    • Appears in scale
  • Harland 1: Eras (1990)

    • Interval name: