Hettangian Stage

Earliest Jurassic

The Hettangian Age (201–199 Ma) is the first age in the Early Jurassic Epoch of the Jurassic Period of the Mesozoic Era. It occurs after the Rhaetian Age of the Triassic Period and before the Sinemurian Age.

Geologic Age

  • 201.3±0.2–199.3±0.3 Ma

Eon / Era / Period / Epoch

What happened during this time?

  • Bennettitales: Otozamites mimetes and Otozamites tenuatus

  • Conifers: Brachyphyllum crucis

  • Seed ferns: Sagenopteris pualensis