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Swiss Journal of Geosciences
Fig. 3 | Swiss Journal of Geosciences

Fig. 3

From: The 3D interplay between folding and faulting in a syn-orogenic extensional system: the Simplon Fault Zone in the Central Alps (Switzerland and Italy)

Fig. 3

Extension-parallel folds in the Northern Steep Belt (D4 backfolds). D4 open parasitic folds folding the pre-existent regional S1/S2 fabric (a) and the older Simplon mylonitic foliation Sm (b); calcschist, Sion-Courmayeur Zone, footwall (641204/127695–643759/121857). c S4 crenulation cleavage development associated with the D4 backfolds, calcschist, Sion-Courmayeur Zone, footwall (646136/130530). d Linear constrictional fabric developed in the older high grade Simplon mylonites, augen orthogneiss, Berisal Unit, footwall (644742/119344)

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