ee 
277 
NOTES ON THE GLACIAL DEPOSITS OF 
CLEETHORPES AND DISTRICT. 
JOHN H. COOKE, F.G.S. 
THERE are but few natural rock exposures in the Cleethorpes 
district, as the surface consists almost wholly of glacial clays, sands, 
and gravels. ‘The most prominent topographical feature is the ‘cliff,’ 
an elevation which extends from the railway station for a distance of 
about half a mile to the south-east. It is morainic in character, and 
its deposits, like those of the district surrounding it, are composed 
entirely of beds of the newer glacial series. 
- Until recent years the Cleethorpes cliff was of considerable interest 
from a geological point of view, as it offered along its foreshore the 
only natural exposure that occurs throughout the whole length of the 
Lincolnshire coast-line. Unfortunately, however, it now affords the 
geologist but few opportunities for examination, as twenty years ago 
it was banked by a sea-wall, and its slopes converted into a pleasure 
garden. Previous to the construction of the sea-wall the foreshore 
at this point suffered considerably from the tidal scour of the currents 
and the oblique sea-wash of storm-breakers ; and even now, notwith- 
‘Standing the numerous groins that have been erected to protect the 
front, a marked recession of the shore-line annually takes place to 
the S.E. and the N.W. of the town. 
The superficial deposits of the district admit of a two-fold 
classification :— 
I. Deposits of the Newer Glacial Series : 
(a) Purple boulder clay. 
(6) Hessle boulder clay. ee 
TI. Sands, gravels, peat, and shell marls of post glacial origin. 
The first of these may be again sub-divided into two classes, viz. : 
(a) The undisturbed clays. 
(6) The same clays that have been modified by a re-assortment 
and a re-arrangement of their constituents. 
€ numerous building operations around the town afford 
Strata. The brick-making industry has led to the exploiting of three 
large pits, in each of which the sections in the Hessle and the 
_ Purple boulder clays extend to a considerable distance below high 
water mark. 
The following are the details of a representative fall in each of 
_ the pits that were noted on the occasion of a series of visits paid by 
‘= aie sections in September, October, and F ebruary last :— 
