124 MR. F - w - HARMER on the glacial deposits 
disposed to associate them with the Pleistocene rather than 
with the Pliocene deposits. 
In Norfolk and Suffolk they are composed almost exclusively 
of flint, their special characters being remarkably persistent 
over a wide area. 
An interesting question suggests itself. Were these 
Fig. 6. — Map showing the principal exposures of the Chillesford Clay ( + ), 
and the probable course of one of the estuaries of the Rhine during the 
Chillesford stage. The dotted area indicates approximately the 
distribution of the Pebbly gravels (Westleton Shingle). — F. W. Harmee. 
Reproduced by permission of the Council of the Geologists’ Association. 
