Formation | 87Sr/86Sr from well-preserved rhynchonellids | 87Sr/86Srbelemnites age (Ma) | Bio- or sequence-stratigraphic age (Ma) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Number | Minimum | Maximum | Range | Mean | Maximal | Minimal | Chronostrat. | Mean | Age range | Chronostrat. | Source | |
Marnes bleues d’Hauterive | 5 | 0.707413 | 0.707434 | 0.000021 | 0.707423 | 133.35 ± 0.02 | 133.23 ± 0.02 | E. Hauterivian | 133.29 | ~133.2–133.9 | M.E.Hauterivian | Ammonites |
Marnes d’Uttins | 3 | 0.707448 | 0.707507 | 0.000059 | 0.707473 | 132.22 ± 0.02 | 131.14 ± 0.04 | I.E. Haut.-L.Haut. | 131.68 | ~132.7–131.6 | L.E.-E.L. Haut. | Ammonites |
Urgonien Jaune | 2 | 0.707437 | 0.707477 | 0.000040 | 0.707457 | 129.80 ± 0.16 | 126.08 ± 0.26 | E.-L. Barremian | 127.94 | ~127.5–126.8 | M.L. Barremian | Nannofossils |
Marnes de la Russille | 3 | 0.707443 | 0.707513 | 0.000070 | 0.707474 | 129.34 ± 0.17 | 126.16 ± 0.18 | m.E.-m.L. Barr. | 127.75 | ~127.6–127.4 | M.L. Barremian | Seq. stratigr. |
Urgonien Blanc | 1 | 0.707490 | 0.707490 | 0.707490 | 128.36 ± 0.22 | 128.36 ± 0.22 | I.E.-e.L. Barr. | 128.36 | ~127.4–126.7 | L.L.Barremian | Seq. stratigr |