Part of The Shear Zone Channel. In the Cottian area of the Western Alps, the rocks of the Brianconnais provide a geological time machine back to when the region lay on the continental margin of Europe on the edge of the Tethys ocean. Join Rob as he explores the stratigraphy of famous sites to build a geological history one that informs ideas of how the continental crust rifted to form Tethys and a curious history of earlier rifting too...