Geology
Cornwall was one of the most important mining areas in Europe until the 20th century, due to its intrusions of granite into surrounding sedimentary rocks which resulted in metamorphism and mineralisation. Bodmin Moor and Carn Brea are examples of such granite intrusion. The Lizard peninsula is an example of an ophiolite.
The north coast is more exposed to the prevailing winds from the Atlantic Ocean than the south coast and is more rugged, with many sheer cliffs and steep valleys. The south coast is more sheltered and is interrupted by several rias which provide deep water harbours such as Carrick Roads.
Read more about this topic: Geography Of Cornwall