(1) Geological sketch map of the Pyrenees showing the location of the Lherz body. NPFT: North-Pyrenean Frontal Thrust; NPF: North-Pyrenean Fault; SPF: South-Pyrenean Fault; SPFT: South Pyrenean Frontal Thrust; NPZ: North Pyrenean Zone; SPZ: South Pyrenean Zone (modified after Corre et al., 2016); (2) geological map of the Aulus Basin (modified after Lagabrielle et al., 2016). Locations of the studied sites 1 and 2 are indicated by red stars. Units of massive carbonates are separated by wide areas of polymictic sedimentary breccias. The ultramafic-bearing breccias are restricted to the central part of the Aulus Basin where the peridotite bodies are concentrated. Peak temperatures obtained by RSCM (Raman spectroscopy of carbonaceous material) geothermometry on Mesozoic marble samples are from Clerc et al. (2015). Site 1: 42°48’30.52"N 1°22’52.85"E. Site 2: 42°48’26.78"N 1°23’7.97"E.