Since coming here I have always loved the geology of castle beach, it inspired a lot of my thinking about morphology during and my presentation. Today I discovered a blog with more information on the geology of this place, I knew it was ancient but did not realise how ancient.

“Castle Beach at the end of the promenade is a favourite for locals, as children love to explore the many rock pools at low tide. And if you are interested in geology, take a look at the rocks on the beach. They are over 400 million years old, some of the oldest rocks in England. They were originally laid down as sandstone and silt sediments in the Devonian era and remained undisturbed as horizontal strata for over 100 million years until they were uplifted and deformed by the tremendous pressures of tectonic plates coming together in the final phase of the formation of the supercontinent Pangea. This uplifting produced the Variscan mountain range, the eroded remnants of which are America's Appalachians, the Urals, the Pyrenees, and, in SW England, the high moors of Dartmoor and Bodmin. This unimaginable tectonic pressure also partly melted the underlying mantle, which eventually solidified into a giant granite batholith, which underlies most of Cornwall, outcropping in several areas. The hot granite baked the deformed sediments into a hard metamorphic rock known locally as killas, which cracked as it cooled, allowing mineral-laden waters to rise from the mantle, and crystallise in the cracks. In many parts of Cornwall tin and copper minerals crystallised, while in Falmouth you will see white quartz crystallised into these cracks.” - Sourced from the blog http://min-eng.blogspot.com/2017/04/