The Interglacial Problem and the Glacial and Post glacial Sequence in Northumberland and Durham

THE features of the Glacial deposits and associated phenomena just discussed are in general so clear that most observers would arrive at the same conclusion regarding them, but there are some other features about which, either due to their controversial nature or the conflicting character of the evidence, there is not yet such general agreement. These are (a) the evidence for interglacial Periods in the Drift of these counties, (b) the raised beaches of East Durham, (c) the origin of the leafy clays, (d) the explanation of the distribution of fragments of certain rocks —Flint, Chalk, Magnesian Limestone—in the Superficial Deposits.