ammonites

Hettangian age/stage

General information
Lower boundary: equal to 201.6 Ma (see scale)
Upper boundary: equal to 196.5 Ma (see scale)
Continent: global
See collections within this interval
See map of collections within this interval
Key correlations
Period: Jurassic
Epoch: Early/Lower Jurassic
10 million year bin: Jurassic 1
Contained within
  • Mesozoic
  • Sherman
  • Phanerozoic
    • Previous intervals
  • Triassic
  • Late/Upper Triassic
  • Rhaetian
  • Balfour
  • Otapirian
  • Misikella ultima
  • Misikella rhaetica
  • Misikella posthernsteini-hernsteini
  • Misikella bidentata-posthernsteini
    • Next intervals
  • Sinemurian
  • Late/Upper Sinemurian
  • Early/Lower Sinemurian
  • Plesechioceras harbledownense
  • Asteroceras varians
  • Arnioceras arnouldi
  • Coroniceras
  • Raricostatum
  • Oxynotum
  • Obtusum
  • Turneri
  • Semicostatum
  • Bucklandi
    • Contains
  • Angulata, Early/Lower Hettangian, Late/Upper Hettangian, Liasicus, Middle Hettangian, Planorbis, Psiloceras
    • Shares base with
  • Aratauran, Early/Lower Jurassic, Euphyllites, Franziceras, Herangi, Jurassic
    • Shares top with
  • Pseudaetomoceras
    • Overlaps with
  • Canadensis (196.6 to 190.7 Ma)
    • Appears in scales
  • Late Triassic Stages (2012)
  • Late Triassic Stages (2011)
  • Triassic stages (2010)
  • Gradstein 7: Stages (2004)
  • Palfy Jurassic Stages (2000)
  • Gradstein et al. 1995 Mesozoic Stages (1995)
  • Harland 6: Stages (1990)

    • Interval name: