OF NORFOLK AND SUFFOLK. 
133 
have presented a natural course for the torrential streams 
issuing from the main body of the melting ice. Still later, 
such torrents, in diminished volume and velocity, cutting 
for themselves channels in the valley ice, perhaps between it 
and the sides of the valleys, or in the valley boulder-clay, 
laid down the valley gravel and sand of the lower levels. 
The sculpturing of East Anglia was mainly due, I believe, 
to the special conditions attending the melting of the glacial 
ice, conditions which have wholly ceased to exist. 
Since the final disappearance of the ice comparatively 
little erosion or deposition seem to me to have taken place 
in this district. 
The Cromer moraine may not greatly differ in appearance 
from that it presented when the ice left it ; the boulder- 
clay plateaux of the higher part of Norfolk and Suffolk 
are as level as if some immense steam roller had recently 
passed over them ; no great sheets of gravel are accumulating 
at present along our inland valleys, nor is any river erosion 
now taking place ; the valleys indeed are being gradually 
filled up with silt and alluvium. Broads have disappeared 
from some parts of Norfolk, and will eventually become 
everywhere a thing of the past. An era of geological rest 
has settled down on the fertile lands of East Anglia, and 
we now enjoy in peace the fruits of the glacial disturbance 
and turmoil of the past. 
Illustrations 
CONTOUR MAP OF EAST ANGLIA. 
Fig. 1. Hummocky Drift near Sheringham. 
,, 2. View of one of the Terminal Moraines of central 
Denmark 
, 3. View of the Cromer ridge from West Runton. 
,, 4. Sketch Map showing the distribution of the Chalky 
boulder-clay. . 
,, 5. Section across the Wensum Valley at Norwich. 
,, 6 Sketch Map showing the distribution of the Chillesford 
Clay and of the Westleton Shingle. 
View of a Glacial Sand Plain in central Denmark. 
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