Photo 7. Cambrian sediments exposed in a coastal section just south of the small seaside resort of Borth y Gest, near Porthmadog, north-west Wales. These sediments now lie on the northern margin of the Harlech Dome and consist of multiple layers of quartzose sandstone, siltstone and silty mudstone (the Ffestiniog Flags formation) which were originally laid down as periodic avalanches of submarine
Photo 7. Cambrian sediments exposed in a coastal section just south of the small seaside resort of Borth y Gest, near Porthmadog, north-west Wales. These sediments now lie on the northern margin of the Harlech Dome and consist of multiple layers of quartzose sandstone, siltstone and silty mudstone (the Ffestiniog Flags formation) which were originally laid down as periodic avalanches of submarine