Internal Folded Jura

Représentation et statut

Origine du nom: Partie interne (la plus proche des Alpes) du Jura plissé, formant les plus hauts sommets de la chaîne jurassienne.

Variantes historiques: Jura interne = Haute-Chaîne (Sommaruga 1997), Faltenjura = Internal Jura Mountains = Haute Chaîne (Ursprung 2022), Internal Folded Jura (TK500 / Gouffon et al. 2024)

Description: Relief tectonique (fold-and-thrust belt) formé par une couverture sédimentaire méso-cénozoïque allochthone, chevauchée et plissée sur l'avant-pays nord-alpin.

Unités hiérarchiquement subordonnées

Extension géographique: Haute-Chaîne jurassienne (Crêt de la Neige, Risoux, Mont Tendre, ...)

Termes génériques

Type de protolithe

Révision: Gouffon Yves (Editor) (2024) : Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern

p.26: The Internal Folded Jura and the Foreland Plateau differ in tectonic style, with a change from intensive folding and overthrusting to folds with large wavelengths and small amplitudes. In detail, however, a distinction is difficult and usually based more on morphology than tectonics; there is often no well-defined tectonic element between the two regions (see Pl. II, western cross-section), except for the morphological northwestern boundary of the Foreland Plateau Molasse. The Internal Folded Jura and the Foreland Plateau are therefore considered here as a single tectonic unit: the main part of the detached sedimentary wedge and its heavily deformed frontal part.
The Internal Folded Jura represents the most intensely deformed part of the Detached North Alpine Foreland. In a similar manner to the whole Jura Mountains, it forms a prominent arcuate chain in eastern France and northwestern Switzerland.