WESTLETON BEDS TO THOSE OF NORFOLK, ETC. 



129 



is evident from the circumstance that at the Clacton end of the 

 cliffs these gravels * divide and admit between them the Post- 

 Glacial mammaliferoiis deposit described by the late Mr. J. Brown 

 and by the Eev. 0. Fisher f. 



Fig. 5. — Section of the Cliff one mile south-east of Clacton. 



^B 



feet. 



a. Coarse ochveous Gravel 4 to 6 



? c. Alternating beds of fine and worn gravel, finely bedded or 

 vrith oblique lamination. Colours ochreous, vrbite, and 



dark ferruginous 8 to 12 



/. London Clay. 

 At Clacton the two gravels are divided at -^ by the Post-Glacial clays 

 mentioned above. 



The Lower Gravel, which is imbedded in a matrix of loamy 

 brown quartzose sand, quartz-grit, with innumerable fine fragments 

 of flint, is composed as under : — 



per cent. 



1. Flint-pebbles 24 



2. White quartz-pebbles 16 



3. Subangular fragments of flint, mostly white, but a few stained 



brown 32 ? 



4. Subangular fragments of white and yellow cherty ragstone 10 



Subangular fragments of brown and red chert 8 



5. Pebbles of light-colovired (?) quartzite, dark sandstone, and Lydian 



stone 10 ? 



100 



I have, however, some doubts about this correlation. The bed 

 may be of Post-Glacial age. 



It is also a question whether some of the thick gravels of Central 

 east-Essex may not be of Westleton age 4:. iSome well-sections 

 seem to indicate that such is the case in respect to the base of the 

 great spread of gravel west of Colchester. This bank is from 30 to 

 50 feet thick, and the upper part consists of gravel of Glacial age. 

 It maybe seen from the railway-sections how closely associated 



^ The surface of the lower gravel should be examined for palaiolithic flints. 



t Mag. Nat. Hist. ser. 2, vol. iv. p. 11)7 (1840) ; Geol. Mag. vol. v. p. 214 

 (18G8). See also the Survey Memoir by lilr. W. 11. Dalton. 



J The Kev. O. Fisher informs me that the pebble-gravel is well developed 

 at Elmstead, near Colchester, and at Alresford, near St. O.-iVth. 



