Stone : siltite (almost transformed into a slate)
Type : metamorphic rock derived from a sedimentary rock
Age : between 590 and 540 million years
Carrière : Ripennelais, Saint-Aubin des Landes (Ille-et-Vilaine)
![](local/cache-vignettes/L1920xH1032/8d7fdd6e7df83dd71cd273bcedbc3a-17457.jpg?1711119983)
Stone : siltite (almost transformed into a slate)
Type : metamorphic rock derived from a sedimentary rock
Age : between 590 and 540 million years
Carrière : Ripennelais, Saint-Aubin des Landes (Ille-et-Vilaine)