Supplementary Material

TEXT FILE (content : 1. text of sections 3.2.4, 3.3.3 and 5; 2. Detailed captions of figures S1 to S11 and tables S12 to S20).

Fig. S1. Field aspects of the Urdach breccia and views from the Mer de Her area.

Fig. S2. Deformation and fluid-rock interactions in the Mesozoic cover above the Urdach cover décollement.

Fig. S3. Microscopic view of the serpentinized Urdach mantle (sample URD4).

Fig. S4. The Bilatre quarry ophicalcites: sample URD1, hand specimen and microscopic aspects.

Fig. S5. The Bilatre quarry ophicalcites: sample URD12, hand specimen and microscopic aspects.

Fig. S6. In situ U/Pb zircon dating.

Fig. S7. Metasomatic rocks of the crust-mantle detachment.

Fig. S8. Microphotograph of the main rock-types composing the cover décollement fault rocks along (i) the “ball trap” (A to I, location of samples in fig. 10) and (ii) the Peillou sections (J, K, L).

Fig. S9. Triassic tectonic breccia at Peillou: sample BCOR300c.

Fig. S10. Lavas in the Late Albian flysch at Bilatre : macroscopic aspects.

Fig. S11. Lavas in the Late Albian flysch at Bilatre : microscopic aspects.

Table S1. Major and trace element analysis of handpicked glassy spherulites from Bilatre.

Table S2. Operating conditions for the LA-ICP-MS equipment.

Table S3. U-Th-Pb data obtained on zircon grains by LA-ICP-MS.

Table S4. Microprobe mineralogical analyses, sample URD9-1.

Table S5. Microprobe mineralogical analyses, sample URD9b.

Table S6. Microprobe mineralogical analyses, sample URD9c.

Table S7. Microprobe mineralogical analyses, sample URD9f.

Table S8. Microprobe mineralogical analyses, sample BCOR115.

Table S9. Microprobe mineralogical analyses, sample URD17b.

Table S10. Microprobe mineralogical analyses, sample URD17a.

Table S11. Microprobe mineralogical analyses, sample URD16.

Table S12. Microprobe mineralogical analyses, sample URD13.

Table S13. Microprobe mineralogical analyses, sample URD18.

Table S14. Microprobe mineralogical analyses, sample URD14.

Table S15. Microprobe mineralogical analyses, sample URD19.

Table S16. Microprobe mineralogical analyses, sample URD15.

Table S17. Microprobe mineralogical analyses, sample BCOR300a.

Table S18. Microprobe mineralogical analyses, sample BCOR300b.

Table S19. Microprobe mineralogical analyses, sample BCOR300c.

Table S20. Microprobe mineralogical analyses, sample BCOR300e.

© Y. Lagabrielle et al., Published by EDP Sciences 2019