ammonites

Middle Jurassic epoch

General information
Lower boundary: equal to 175.6 Ma (based on Kawhia)
Upper boundary: equal to 161.2 Ma (based on Callovian)
Continent: global
See collections within this interval
See map of collections within this interval
Key correlations
Period: Jurassic
Contained within
  • Jurassic
  • Mesozoic
  • Sherman
  • Phanerozoic
    • Previous intervals
  • Early/Lower Jurassic
  • Toarcian
  • Late/Upper Toarcian
  • Middle Toarcian
  • Yakounensis
  • Hillebrandti
  • Crassicosta
  • Levesquei
  • Thouarsense
  • Variabilis
  • Bifrons
  • Herangi
  • Ururoan
    • Next intervals
  • Late/Upper Jurassic
  • Oxfordian
  • Late/Upper Oxfordian
  • Middle Oxfordian
  • Early/Lower Oxfordian
  • Heterian
    • Equivalent to
  • Temaikan
    • Contains
  • Bajocian, Bathonian, Crassicostatus, Discites, Early/Lower Bajocian, Early/Lower Bathonian, Epizigzagiceras, Garantiana, Humphresianum, Kirschneri, Laeviuscula, Late/Upper Bajocian, Late/Upper Bathonian, Middle Bathonian, Oblatum, Parkinsoni, Rotundum, Sauzei, Subfurcatum, Widebayense
    • Shares base with
  • Aalenian, Concavum, Early/Lower Aalenian, Howelli, Kawhia, Late/Upper Aalenian, Middle Aalenian, Murchisonae, Opalinum, Scissum, Westermanni
    • Shares top with
  • Callovian, Early/Lower Callovian, Late/Upper Callovian, Middle Callovian
    • Appears in scales
  • Gradstein 5: Epochs (2004)
  • Harland 4: Epochs (1990)

    • Interval name: