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Ordovician period

General information
Lower boundary: equal to 488.3 Ma (based on Tremadocian)
Upper boundary: equal to 443.7 Ma (based on Rhuddanian)
Continent: global
See collections within this interval
See map of collections within this interval
Contained within
Overlaps with
  • Sherman (457.5 to 298.9 Ma)
  • Olentian (501.0 to 484.5 Ma)
  • Appears in scales

    Interval name: