The three kinds of breccias outcropping in the Aulus basin, close to the Lherz lherzolite massif. I – Western Etang de Lherz cataclasic breccias: A – mechanical contact between carbonate-bearing breccia (left) and lherzolite (right). B – Detail showing angular dolomitic clasts within a limestone-rich cement. II – Eastern Coumettes karstic breccias: C – general view of the Le Paille fault infilling (brown coloured) above Jurassic limestones and dolostones. D – Detail showing the bedded organisation involving rough coarce breccias (lherzolite and carbonate elements) and thin bedded sandstones. E – Karstic infilling (brown) above massive cataclasic breccia (grey) reworking mainly Jurassic limestones. F – Detail showing the sub-horizontal bedded infilling (sandstones followed by carbonate and lherzolite-bearing conglomerate). III – Agnes pass diapiric breccias: G – General view of the Agnes Pass diapir showing the Triassic core (left) made up of highly metamorphosed and unbrecciated Muschelkalk limestones followed by Keuper-type gypsiferous clays (center) and the Tuc de Pedrous collapse breccias involving mainly Jurassic elements (right). H – Close to the Agnes Pass, the Middle Triassic limestones located below the Upper Triassic salt during the Lower Cretaceous diapiric event are deeply metamorphosed but devoid of diapiric breccias.