I call it Unearthed Art, I dont know if it has a propper name but I take mud/clay/pigments from the cliffs in the bay and turn them into oil paint using a process of drying and mixing with Linseed Oil.  The range of colours range from the palest grey to the deepest umber and black and the texture in each piece is quite amazing.  I like that Im using the actual cliff to paint the cliffs so instead of it being erroded into the sea it captures that moment in time for ever.