One of the stand-outs for me about this coastline is the spectacular geology - it’s incredibly varied, with some of the oldest formations I will see until I get up to Scotland. Here is a little summary of the geology that has stood out to me so far. Penzance and Mount’s Bay Mainly Devonian slates and sandstones with more recent alluvial deposits and beach sands in the bay, , and the beautiful St Michael’s Mount a granite outcrop connected to the mainland by a tidal causeway. Mount’s Bay to Porthcurno M etamorphosed mudstones and slates apparently called killas appear along side granite intrusions from the larger Land’s End Granite mass which I crossed on the second day. We started to notice striking black “dykes” - exposures of contact metamorphism , where the granite intruded into the sedimentary rocks. I hadn’t been aware of these before but they are called hornfels . There are also quartz veins ...