LAMPLUGH : GLACIAL BEDS. 
173 
It is also traceable along the coast as far as Whitby, 
beyond which I have not yet examined the sections. 
It seems to have no representative at Bridlington, but re- 
appears further south, between Hornsea and Withernsea, and 
is well seen at Dimlington, six miles south of the latter place. 
It does not seem to have been treated before as a separate 
clay, but it certainly has as good a right to be so considered 
as have any of the other divisions. 
It contains a few small shell fragments. 
The next Boulder clay, which nearly always forms the 
top of the cliff, is red in colour, and shows, in some places, 
ashy-blue facing to its fissures. 
In these sections it but rarely attains to, and never exceeds, 
a thickness of 12 feet. It is more earthy and broken than 
any of the other clays, and contains few stones of any size. 
Amongst its few Boulders, however, I noticed a piece of shale 
which showed very distinct scratches. 
It sometimes lies directly on the Brown clay, in which 
case the division between them is not very distinct, but 
oftener a band of sand and gravel separates them. This 
gravel, which is often very coarse and bouldery, is generally 
from one to four feet in thickness ; but just north of Hunmanby 
Gap it swells out so as to have a thickness of nearly thirty 
feet, and here the top red clay passes into it for a short space. 
These gravels, also, sometimes admit into their midst a thin 
band of very dark greenish boulder clay, which is not, how- 
ever, regular and continuous enough to be separated from them. 
I do not hesitate to identify this top red clay, which 
forms the capping bed to nearly all the sections between 
Speeton and Filey, with that to which, on the Holderness 
coast, Messrs. Wood and Rome have given the name of 
"Hessle Clay," and which, as is mentioned in the com- 
mencement of this paper, these gentlemen have traced inland 
" through the vale of York into that of the Tees;" but 
