154 
CROMEK EOREST-BED. 
This section is interesting, because, as the Eev. 0. Fisher has 
pointed out,* it is the most westerly exposure of the typical 
Forest-bed. The cakes of peat included in it also appear to point 
to the destruction of the Lower Freshwater Bed. The quartzite 
gravels, which seem nearly everywhere to form the upper part 
of the Estuarine division, and often overlap the clays, appear to 
have been at this point cut out by the Leda myalis Bed. From 
here to Sherringham the section is much obscured by talus, but 
one or two somewhat similar exposures can occasionally be 
examined, and in one place I noticed what seemed to be traces 
of a Pre-glacial soil. An angular boulder of felsite, 11 inches 
long, was obtained from the base of the Forest-bed at Sherring¬ 
ham ; it is one of the very few instances in which igneous rocks 
have been found in these Pre-glacial gravels. Several masses of 
vein quartz and rounded boulders of quartzite nearly a foot in 
diameter have also been found in the Forest-bed in this neigh¬ 
bourhood. None of these erratics show any trace of glacial 
scratching. 
Immediately east of Lower Sherringham, sands and thin 
greyish loams containing occasional specimens of Pisidium and 
Succinea are found. These may belong to the Upper Fresh¬ 
water Bed, but more probably they represent the higher Arctic 
one. At this point, and wherever all the Pre-glacial beds in the 
cliff happen to be sandy, it is almost impossible to trace definite 
lines of division, but the included fossils prove without doubt 
that very different conditions must have prevailed during the 
deposition of successive portions of the sand. Where the beds 
are clayey there is seldom much difficulty about the lines of 
junction, for the older deposits generally show more or less erosion. 
Below this Freshwater Bed there are sands and quartzite gravels, 
here sometimes resting immediately on the Chalk without any 
intervening Weybourn Crag. 
A short distance further south-east, under Beeston Hills, we 
have the important exposure, shown in Section 3 of the folding 
plate in the Cromer Memoir. Here the e^uarine quartzite 
gravel is thin, as is the Weybourn Crag, but has yielded a 
few badly preserved bones. Above it we find a bed of blue- 
black peaty loam, for the most part rather stony. This bed 
is full of plant remains; but, as at Weybourn, all purely cal¬ 
careous fossils have disappeared. It has yielded teeth and bones 
of pike, abundance of seeds, and opercula of Bythinia, but no 
shells. Among the common plants are several species of Scirpus, 
Geratophyllum demersum, Mippuris vulgaris, Rumex mari- 
timus, Potamogeton heterophyllus, P, trichoides, P. pectinatus, 
Ohara, &c. Besting on this Upper Freshwater Bed there is 
gravelly sand with occasional marine shells, perhaps only deri¬ 
vative, above which is found the Arctic Freshwater Bed. At a 
point mid-way between the Hill and the Stream all the beds are 
fossiliferous, and the following section is shown; the beds con- 
* Gcol. Mag., vol. v., p. 545. (1868.) 
