ins.: 2020-12-01 19:51; ( Age: 3 yrs )
Ammonites in cross section at about 300 m depth.
Ammonites in cross section at about 300 m depth. Ammonite identifications provide one of the most important ways to give these rocks a relative geological age. Ultimately, the team aims to tie together all major methods in stratigraphy to come up with a really detailed and accurate numerical timescale for the Early Jurassic. The fact that the core contains abundant ammonite fossils augurs well for the follow-up science.