CHAPTER III. GRANITES OF ENGLAND. The occurrence of granite in England is limited to a very few localities, viz.:—Sliap Fell, in Cumber land ; Anglesea, Devon and Cornwall, Lundy Island, the Channel Islands, and the Isle of Man. Of these the following are selected for description :— Granite of Dartmoor. Granite forms at Dartmoor an elevated tract of moorland, rising into fantastic masses, or Tors, resulting from the process of weather ing along the original joints of the rock. It has a prevailing greyish colour, and is frequently porphy- ritic; in which form it has been used in the construc tion of London Bridge. Quarries were formerly opened at High Tor, on the east of Dartmoor, and at Hingston Down ; but those at the former locality are now abandoned, and others at Cheesewring, near Liskeard, have been opened, from which a stone of a beautiful quality is raised, and exported in large quantities from Looe. 1 There are also quarries at Fremator, near Tavistock, and at Blackenstone, Dartmoor. Granites of Cornwall. The granites of Cornwall 1 Descrip. Guide M. P. G., p. 19.