Some portions of the Lancashire coast in the Furness district give evidence of considerable changes of level since the first elevation of the Glacial deposits. The Boulder-clay formation of Cumberland and Lancashire exhibits a well-marked subdivision into a lowertough blue Boulder-clay, overlain, apparently on its eroded surface, by a redder silty clay of more variable composition. The same subdivision holds good along the coast of N. Wales; but I cannot satisfy myself that it can be definitely correlated with the succession of the Glacial series of the Norfolk and Suffolk coasts, or that the lower tough blue Clay can be traced inland much above highwater level.