Hettangian Stage
Earliest Jurassic
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
Geologic Age
201.3±0.2–199.3±0.3 Ma
Eon / Era / Period / Epoch
Eon / Era / Period / Epoch
What happened during this time?
What happened during this time?
Bennettitales: Otozamites mimetes and Otozamites tenuatus
Conifers: Brachyphyllum crucis
Seed ferns: Sagenopteris pualensis
