Page:Cornwall; Cambridge county geographies.djvu/58

 42 CORNWALL have no more the wind-swept background of heights, barren and often tortured by miners, turned into a waste of heaps of rubble and studded with ruined engine-houses. We find instead a gentler sea-board, pierced by long estuaries, and with valleys of rich vegetation running down to the sea. We speedily leave the granite and the culm measures, and are among the rocks of the Devonian series, less stern and forbidding in colour. In St Levan parish Newlyn Pier at Trereen Point is the Logan Rock, a block of granite weighing over 65 tons, once so nicely balanced that it could be made to rock by the finger of a child. In 1874 a young naval officer, with the assistance of a boat's crew, upset it. This raised a storm of indignation in Cornwall, and the Admiralty ordered him to replace it, which he did, at great expense.