Table 3 Thicknesses of lithostratigraphic units of the Latest Triassic and Early Jurassic in SW Germany
Formation (Fm.) | Thickness compacted [m] | Thickness decompacted [m] | Sedimentation Rate [m/Myr] compacted sediment | Sedimentation Rate [m/Myr] decompacted sediment | Decompaction Factor | Ammonite Zone | Age [Myr] | Duration [Myr] |
|---|---|---|---|---|---|---|---|---|
Jurensismergel Fm. and Opalinuston Fm. | 1.8–8.0 | 3.6–16.0 | 0.5–2.0 | 0.9–4.0 | 2 | Variabilis–Aalensis | 178.2–174.2 | 4 |
Posidonienschiefer Fm. | 1.7–12.4 | 3.3–24.9 | 0.3–2.3 | 0.6–4.6 | 2 | Tenuicostatum–Bifrons | 183.6–178.2 | 5.4 |
Amaltheenton Fm. | 1.6–10.2 | 3.1–20.4 | 0.3–2.2 | 0.7–4.3 | 2 | Margaritatus–Tenuicostatum | 188.3–183.6 | 4.7 |
Numismalismergel Fm. | 0.7–3.0 | 1.4–6.0 | 0.3–1.1 | 0.5–2.2 | 2 | Jamesoni–Davoei | 191.0–188.3 | 2.7 |
Obtususton Fm. | 15.0–25.0 | 30.0–50.0 | 3.9–6.4 | 5.9–12.8 | 2 | Obtusum–Jamesoni | 194.9–191.0 | 3.9 |
Arietenkalk Fm. | 2.6–c. 6.0 | 3.9–9.0 | 0.6–1.3 | 0.9–1.2 | 1.5 | Bucklandi–Obtusum | 199.4–194.9 | 4.5 |
Angulatenton Fm. | 0.4–2.0 | 0.6–3.0 | 0.6–2.9 | 0.9–4.3 | 1.5 | Angulata | 200.1–199.4 | 0.7 |
Psilonotenton Fm. | 0–9.1 | 0–18.2 | 0–9.1 | 0–18.2 | 2 | Planorbis–Liasicus | 201.1–200.1 | 1 |
Early Jurassic | 36.0–c. 65.0 | / | 1.3–2.4 | / | / | Planorbis–Aalensis | 201.1–174.2 | 27 |
Exter Fm. | 0–8.5 | 0–13.6 | 0–1.0 | 0–1.6 | 1.6 | / | 209.6–201.1 (205.8–201.1) | 8.5 (4.7) |