Ammonite Chrons of Northwest Europe
The interval definitions in this timescale are derived from the following source:
- J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
There are 5 timescales which overlap this one. show
Interval names marked with † are no longer in current use.
This timescale is used in the definition of 6294 collections
| International Chronostratigraphic Timescale | Ammonite Chrons of Northwest Europe | ||||
|---|---|---|---|---|---|
| Jurassic | Middle Jurassic | Bajocian | Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites | 168.2 | |
| Humphresianum | 168.4 | ||||
| Aalenian | Concavum/Murchisonae/Opalinum | 170.9 | |||
| Early Jurassic | Toarcian | Levesquei/Variabilis/Bifrons | Thouarsense | 174.7 | |
| 180.1 | |||||
| Serpentinum/Falciferum/Tenuicostatum | 182 | ||||
| Pliensbachian | Spinatum/Margaritatus/Davoei/Ibex/Jamesoni | 184.2 | |||
| Sinemurian | Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi | 192.9 | |||
| Hettangian | Angulata/Liasicus/Planorbis | 199.5 | |||
| 201.4 | |||||