The Château de Saint-Martin estate is located 130 metres in altitude.
Formations dating back to the Upper Triassic (from 201 to 252 Million years ago)
+ 1-metre-thick layers of clay
+ vermiculated limestone from the Palaeozoic Era
Crystalline formations from the Massif des Maures, red shale, coarse sandstone, fine clay with grains of quartz, and silt from scree slopes