192 
DEPOSITS OP DOUBTFUL AGE, 
a little gravel. Tlie> whole deposit, which nowhere exceeds 20 
feet in thickness, is more constant in lithological character 
than most of the associated beds. 
In the immediate neighbourhood of Weybourn no trace of this 
horizon has yet been found, and the first fossiliferous section 
occurs about 700 yards west of Old Hithe. Here, above the 
shelly Weybourn Crag, may be seen a bed of stiff blue clay with 
fragments of oysters; but as there is much talus on each side of 
the section, and a glacial disturbance also affects the beds, it is 
impossible to trace the clay more than a few yards. 
Though imfossiliferous sections under Skelding Hill have been 
doubtfully referred to this horizon, no exposure showing either 
fossils or satisfactory stratigraphical relations, occurs in this 
neighbourhood till we arrive at a point a quarter of a mile west 
of Lower Sherringham, and nearly under the stile at the edge of 
the cliff. Unfortunately at this point there are constant land¬ 
slips, and all that can definitely be made out is, that, resting 
directly on the Weybourn Crag, and lying in a basin eroded 
through the Forest-bed, there is a mass of sand and small gravel, 
the lower 5 feet of which is full of oysters with the valves united. 
The character of this deposit indicates a depth of water of at least 
5 fathoms, probably of about 10 ; while the underlying Weybourn 
Crag is a shallow-water bed formed at or just below low-water 
mark. This oyster bed thins out rapidly both east and west; 
for though so thick in the centre, and full of fossils, no shells 
are seen in it 20 yards away in either direction. Owing 
to the mud streams and constant slips, it has not been possible 
properly to examine the section, but it is likely to yield an 
important fauna. The shells are difficult to extract, being 
saturated with water and tender, but when dried they harden, 
and will bear handling. The species obained were ;— 
Littorina littorea. 
ISTatica, sp. 
Purpura lapillus, 
Cardium edule. 
X Cyprina islandica (young only). 
Mytilus edulis. 
X Ostrea edulis. 
Tellina balthica. 
-obliqua. 
X Balanus, sp. 
Those marked x had the valves united. A few yards both to the 
right and to the left the clays of the Forest-bed come on between 
the Weybourn Crag and the Leda-myalis Bed. 
The next fossiliferous exposure is at Beeston, where gravelly 
sand with occasional scattered marine shells, can be seen in vertical 
section definitely between the Upper and the Arctic Fresh¬ 
water Beds, all the deposits being fossiliferous. The only shells 
that could be found here were Tellina balthica and fragments of 
Cyprina islandica. 
From Beeston to Cromer the stratum appears to be continuous, 
except where cut out by the Boulder Clay, but the only fossili¬ 
ferous sections are at West Eunton, and between that place and 
Wood Plill. At West Eunton on each side of the Gap is found 
