Cornwall
Cornwall is a very rich location for studying geology, with locations for studying igneous, metamorphic and sedimentary rocks, as well as folding, faulting, quarrying and mining. Over the coming term, I am hoping to populate each of these pages on key Cornish fieldwork locations, to include the observations and exercises which my school use to help students to understand the geology.
I have not checked them for accuracy, but here are some web resources for the geology of Cornwall and South Devon:
Devon's Rocks - A geological guide
Geological guide to the area south of Plymouth Sound
Here is my comment on a panoramic photograph taken near Holbeton eight miles to the SE of Plymouth in Devon.
Try: http://www.devon.gov.uk/geo-devonrocksgeologyguide.pdf
According to a local planning document, http://www.southhams.gov.uk/planningdocs/1/00/03/91/00039169.pdf, the rocks near here are slates and grits of the Lower Devonian Staddon Series. They look similar to the Devonian rocks of Cornwall and like them, were deposited in the Rheic Ocean, which then closed in a mountain building period called the Variscan Orogeny. The beds are near-vertical because of the intense folding that happened during north-south continental-continental collision, ultimately helping to form the ancient supercontinent called Pangea. The characteristic strike of the beds and therefore trend of the fold axes is east-west, which seems consistent with your picture, which presumably was taken as the sun approached the west and you are looking along the strike of the beds. One more pretty picture is this map of the geology of Cornwall and south Devon: http://myweb.tiscali.co.uk/geologyofcornwall/images/Basins.gif
The granites to the north of here were formed later, after the height of the mountain building period had finished and the crust began to thin, bringing hot material near the surface and causing partial melting in the lower crust. Sorry if this is information overload!