Plate, outline of earth in arches of foliation by Daniel Sharpe Diagram showing an outline of the earth in various arches of foliation found in valleys of northern Scotland. Subject: Geology Published in Philosophical Transactions as 'On the arrangement of the foliation and cleavage of the rocks of the north of Scotland'. Received by the Royal Society on 20 November 1851. Read 19 February 1852. [1851]