president’s address. 
357 
yield the Arctic forms found at Hoxne, yet, as Mr. Reid has 
remarked, there was no reason to conclude that the freshwater beds 
at the two localities were distinct in age. 
My colleague, Mr. F. J. Bennett, has described a section at the 
brickyard west of the church at Rickingliall Superior, south-west 
of Botesdale ; and there beneath Boulder Clay, and sand with 
layers of grey clay, he found dark blue laminated sandy clay, with 
freshwater shells and plant- remains. ' This locality might repay 
investigation ; but sufficient lias been said to show that much 
interest attaches to the fossiliferous beds that overlie and underlie 
our main mass of Boulder Clay. 
A good deal of attention has been given during the past fifteen 
years to the source of the various crystalline rocks that occur in 
our Drift deposits. Quite recently Herr Victor Madsen, <>f the 
Danish Geological Survey, lias recognised boulders in the Cromer 
Till that lie regards as certainly of Scandinavian origin. t This 
view is in accordance with that of previous observers. It is to be 
hoped that some space may be given in the new Museum to the 
exhibition of our Norfolk erratic rocks. 
In a large county like Norfolk there must every year be many 
fresh sections to record. The student need not hesitate to note 
new facts, even if they present no new features. Had it not been 
for the observations of Caleb Rose on the brickoarth of the Nar 
Valley, we should now know very little of that deposit. 1 say 
this on the authority of my colleague, Mr. Whitaker, who was 
engaged on the Geological Survey of that region. In preparing 
the geological map he had only a few ditch-sections to rely upon 
in his examination of the Nar Valley brickearth ; but fortunately 
he had the careful records of sections in brickyards now closed, 
that were made nearly sixty years ago by Rose. In the Survey 
Memoir (now in the press) he acknowledges the great help thus 
afforded by that excellent observer. 
So in other parts of the county, deep foundations, new pits and 
quarries, well-sinkings and borings, may afford a large amount of 
* Geology of Diss. Eve. See.. (Geol. Survey), p. 12. 
t Quart. Journ. Geol. Soc. vol. xlix. p. 114. 
