IIO MR. F. W. HARMER ON THE GLACIAL DEPOSITS 
At Wood’s death I withdrew from active geological work, 
and it was not until ten years later that I was able to 
resume it. The views here given, so far as they differ from 
those of our earlier papers, are the result of my later investiga- 
tions, rendered possible to an old man by the fortunate 
invention of the motor-car, which literally gave me a new 
lease of geological life for field work. 
The view taken in this paper is that the glacial deposits 
of Norfolk were due in the first instance to the invasion of the 
county by the western edge of an enormous ice-sheet like 
that of Greenland which, originating on the Scandinavian 
uplands, then standing in all probability at a higher level, 
filled the basin of the North Sea, and overspread, in the 
opinion of most of our best authorities, the plains of Northern 
Europe. At a later stage of the Pleistocene epoch, however, 
the North Sea ice retreated from East Anglia, and there are 
no indications that it ever re-appeared. Subsequently, 
and apparently separated from the earlier glaciation by 
a considerable interval, the district was invaded by an 
inland ice-stream from the north-west, for which, in 1904 
I proposed the name of the “ Great Eastern Glacier.”* 
THE NORTH SEA DRIFT. 
The part of Norfolk lying to the east of the dotted line A B 
on the contour map here published, is covered by a mass 
of travelled and for the most part unstratified detritus 
which, owing to its disturbed condition in the long coast 
section between Weybourne and Elasboro, was appropriately 
called by Sir Chas. Lyell the “ Contorted Drift.” When 
mapping the country I ascertained that this drift might be 
traced more or less continuously to Norwich and Beccles, in 
which direction it passed horizontally into the bed of brick- 
earth out of which the red bricks of that district have long 
been made. 
These earlier glacial deposits are specially characterized 
by containing erratic boulders of various igneous rocks, some 
Rep. Brit. Assoc. (1904), p. 542. 
