170.9 - 168.2 Ma

The definition of this interval in the timescale International Chronostratigraphic Timescale is taken from the following source:

• K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are intervals in 5 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Middle Jurassic epoch
• Mesozoic Subages: Early Bajocian subage, Late Bajocian subage
• Ammonite Chrons of Northwest Europe: Parkinsoni chron, Subfurcatum chron, Laeviuscula chron, Sauzei chron, Humphresianum chron, Discites chron, Garantiana chron
• Ammonite Chrons of North America: Crassicostatus chron, Rotundum chron, Epizigzagiceras chron, Widebayense chron, Oblatum chron, Kirschneri chron
• Permian-Jurassic of New Zealand: Kawhia epoch, Temaikan age

This interval is used in the definition of 1127 collections

A total of 1705 collections with 9469 occurrences lie within this time span