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Swiss Journal of Geosciences
Fig. 8 | Swiss Journal of Geosciences

Fig. 8

From: Anatomy of a km-scale fault zone controlling the Oligo-Miocene bending of the Ligurian Alps (NW Italy): integration of field and 3D high-resolution digital outcrop model data

Fig. 8

Main features of the Horse Head Fault zone exposed at Monte dei Marmi (Fig. 2). A Cataclastic fault core in Jurassic marble. The domain enveloping the large angular clasts is constituted by fine-grained cataclasite. B Fault zone at the contact between dolostone-limestone (on the left) and quartzite (on the right). Carbonate rocks form mostly cataclasite of various grain size with slickensides whereas in quarzite fault gouge are dominant. C Detail of the contact in B showing the comminuted gouge in the fault core. D Quartz-dominated domain appears as cohesive breccia of angular clasts (black arrow) and cataclasite, whereas the phyllosilicate-rich layers form shear zones, with relicts (E, F) preserving the ductile Alpine D1-2 schistosities. G Another detail of quartzite gouge contacting large angular clasts

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