«Oehningien» (du Jura)

Rappresentazione e statuto

Varianti storiche: Molasse vindobonienne auct., Oeningien (Greppin 1859), 38e Etage = Oeningien (Greppin 1866), OEningien = calcaire d'eau douce supérieur (Rollier 1892a), Oeninger Süsswasser-Kalke (Baltzer 1906), Calcaires oeningiens du Locle, de Morteau, du vallon des Lavaux et de Goux-les-Uziers (Rollier 1911), Marno-calcaires lacustres oeningiens = Marnes et Marno-calcaires oeningiens = Oeningien du Haut-Jura (Rollier 1912a), Tortonien (Bourquin 1946), Oehningien (Kübler 1962), Formation de l'«Oeningien» (Becker 2003), Tortonien-Oehningien du Locle (Weidmann et al. 2008), «Oehningien» (Kälin & Kempf 2009), «Oeningian» lacustrine complex (Mojon et al. 2018)

Unità di rango inferiore

Geomorfologia

Osservazioni sul tetto

MN 7 + MN 8

Età alla base

Osservazioni sulla base

MN 6

Metodo di datazione: Micromammifères (Kälin et al. 2001) ; MN5-6 - MN7+8 (Mojon et al. 2018)

Revisione: Kälin Daniel, Kempf Oliver (2009) : High-resolution stratigraphy from the continental record of the Middle Miocene Northern Alpine Foreland Basin of Switzerland. N. Jb. Geol. Paläont. Abh. 254/1-2, 177-235

The overlaying «Oehningien», an approx. 200 m thick succession of mainly limnic and lacustrine sediments interbedded with numerous paleosols, has yielded many mammal sites (Kälin et al. 2001). A few meters above the base of the «Oehningien» one or two thin bentonite layers have been recorded (FAVRE 1911, Hofmann 1958a, Kälin et al. 2001). At the locality Combe Girard 41, one of these bentonites is associated with a small mammal fauna, indicating an upper MN 6 age (Kälin et al. 2001). The Le Locle Combe Girard bentonite is therefore younger than the Leimbach bentonite of Eastern Switzerland, which is situated in the middle part of MN 6.

Pubblicazioni importanti: Kübler Bernard (1962) : Etude de l'Oehningien (Tortonien) du Locle (Neuchâtel, Suisse). Bull. Soc. Sci. Nat. Neuchâtel 85, 5–42