306 HARMER : FIELD EXCURSION TO CROMER, ETC. 
miles to the N.W., of a large block of laurvikite from the 
Christiania Fiord, and a second boulder of the same kind was 
noticed during the day. 
Overlying the till at this spot are some finely laminated 
and ripple-marked beds, the sedim.ent possibly of a stream 
issuing from beneath the ice during its partial or local retreat. 
Above these is an upper boulder-clay, containing much soft 
chalk and black flint, regarded by Mr. Reid as a second till, 
but by Wood as forming part of the Contorted Drift. Speaking 
generally, it may be stated that the Jurassic detritus which 
forms such a marked feature of the Chalky Boulder-clay (Upper 
Glacial of Wood) is conspicuous by its absence from the drifts of 
the Cromer section. PI. XLII., copied from one of the charming 
photogrpvphs taken by Mr. Godfrey Bingley during the excursion,* 
gives a characteristic representation of the disturbances which 
the Lower Glacial beds of this district have undergone ; these 
are not confined, however, to that portion of the latter which 
generally goes under the name of the " Contorted Drift," but 
have also affected in some places the sands and gravels associated 
with it, and in others the basement till itself, as shown in the 
photograph. 
The post-glacial river bed at Mundesley, six miles N.W. of 
Hasboro', described by Lj^ellf and others, was found to be 
no longer visible owing to the im]orovements (?) now being 
carried on at that rising watering place. 
At Trimingham the Chalk appears on the fore-shore, having 
been forced up above its normal level by the North Sea ice, so 
as to form a projecting bluff. This bed is believed to belong to 
a higher zone than any other part of the Cretaceous deposits 
of England — that of Ostrea lunata — and to represent tlie Chalk 
of Maestricht and Riigen. 
Taking a conveyance to Wey bourne, at the other end of 
the cliff section, on the morning of Friday, July 10th, a walk 
* It would be difficult to over-estimate the value of Mr. Bingley' s 
services on this occasion, involving him, it is to be feared, in considerable 
trouble and fatigue. The illustrations given in this paper are copied from 
his photographs. 
t " Antiquity of Man," 1st Ed., p. 223, 18G3. 
