Table 1 Thickness of lithostratigraphic units of the Latest Triassic and Early Jurassic in NW Switzerland
Formation (Fm.)/Member (Mb.) | 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] |
|---|---|---|---|---|---|---|---|---|
Gross Wolf Mb. and lower part Opalinus–Ton | 0.4–42.9 | 0.9–85.8 | 0.1–10.7 | 0.9–85.8 | 2 | Variabilis–Aalensis | 178.2–174.2 | 4 |
Rietheim Mb. | 0–19.5 | 0–39.0 | 0–3.6 | 0–39.0 | 2 | Tenuicostatum–Bifrons | 183.6–178.2 | 5.4 |
Rickenbach Mb./Breitenmatt Mb. (only Müsenegg Bd.) | 0–c. 3.0 | 0–6.0 | 0–0.6 | 0–6 | 2 | Margaritatus–Tenuicostatum | 188.3–183.6 | 4.7 |
Breitenmatt Mb. (excl. Müsenegg Bd.)/upper part Mt. Terri Mb. | 0.5–c. 9.5 | 0.8–14.3 | 0.2– > 3.5 | 0.8–14.3 | 1.5 | Jamesoni–Davoei | 191.0–188.3 | 2.7 |
Frick Mb. & Grünschholz Mb./Fasiswald Mb./lower part Mt. Terri Mb. | 0?; 2.5–27.0 | 0?; 5.0–54.0 | 0?; 0.6–6.9 | 0?, 5.0–54.0 | 2 | Obtusum–Jamesoni | 194.9–191.0 | 3.9 |
upper part Beggingen Mb. and Weissenstein Mb. | 1.5–24.4 | 2.3–36.6 | 0.33–5.4 | 2.3–36.6 | 1.5 | Bucklandi–Obtusum | 199.4–194.9 | 4.5 |
lower part Beggingen Mb. | 0–c. 3.0 | 0–4.5 | 0–4.3 | 0–4.5 | 1.5 | Angulata | 200.1–199.4 | 0.7 |
Schambelen Mb./base Beggingen Mb. | 0–9.1 | 0–18.1 | 0–9.1 | 0–18.1 | 2 | Planorbis–Liasicus | 201.1–200.1 | 1 |
Belchen Mb. (Klettgau Fm.) | 0–7.0 (10.0?) | 0–11.2 (16.0?) | 0–0.8 (1.2?) | 0–11.2 (16) | 1.6 | / | 209.6–201.1 (205.8–201.1) | 8.5 (4.7) |