ammonites
banner
Gateway to the Paleobiology Database

Middle Ordovician epoch

General information
Lower boundary: equal to 471.8 Ma (based on Dapingian)
Upper boundary: equal to 460.9 Ma (based on Darriwilian)
Continent: global
See collections within this interval
See map of collections within this interval
Key correlations
Period: Ordovician
Overlaps with
  • Viru (463.5 to 452.0 Ma)
  • Llandeilo (466.0 to 449.5 Ma)
  • Chazy (466.0 to 457.5 Ma)
  • Castlemainian (472.0 to 468.9 Ma)
  • Arenig (478.6 to 466.0 Ma)
  • Klabava (478.6 to 466.0 Ma)
  • Cassinian (478.6 to 468.1 Ma)
  • Arenigian (478.6 to 468.1 Ma)
  • Dawan (478.6 to 468.1 Ma)
  • Daobaowan (478.6 to 468.1 Ma)
  • Ningkuo (478.6 to 468.1 Ma)
  • Yushanian (478.6 to 468.1 Ma)
  • Valhallan (478.6 to 468.1 Ma)
  • Oeland (488.3 to 463.5 Ma)
  • Jefferson (488.3 to 468.1 Ma)
  • Hunjiang (488.3 to 468.1 Ma)
  • Canadian (488.3 to 468.1 Ma)
  • Jeffersonian (488.3 to 468.1 Ma)
  • Interval name: