344 PLEISTOCENE GEOLOGY OF THE THAMES VALLEY. 



do not differ materially from those of the former section with the 

 exception that a somewhat larger quantity of clay is show^n. 

 We liax'e obtained bones and teeth of Bos prhnigcnius. Rhinoceros 

 sp., and Elcplias sp., here. 



(c.) Still further to the east on the other side of Milwood 

 Lane a similar section is exposed in the tramway cutting of the 

 Lion Cement Works quarry. The brickearth series here con- 

 tains a considerable quantity of irregular chalky gravel, and 

 there are several beds of gravel interstratified with the sand and 

 loam. Towards the southern end of the tramway the section is 

 now much overgrown, but Mr. Whitaker noted (op. cit. p. 418) 

 that " there was at first little but sand ; then gravel and sand 

 over loam and clay, sometimes with sand beneath and still 

 further, before getting to the road, gravel and sand only. 

 South of the road again there was sand and loam, with gravelly 

 layers beneath a little gravel, and then gravel only." 



A new gravel pit in the Lion Cement Works south of the 

 road and within a dozen yards of the junction of the Drift with 

 the alluvium showed twelve feet of exceedingly coarse and 

 almost unstratified gravel, the base of which was not seen. The 

 gravel clearly overlies the brickearth series to the north as is 

 evident from Mr. Whitaker's notes. Mr. W^ L. Reid and the 

 authors have obtained several Palaeolithic flakes from this pit. 



(d.) Grays Portland Cement Works. A good section of the 

 brickearth series is exposed here agreeing in general with those 

 seen in the other pits. It bears a very close resemblance to that 

 of the Tunnel Pit in the very large quantity of chalk pebbles 

 which occur in the lower part of the series. 



(e.) Between Purfleet and Grays there are numerous small 

 sections of the gravel exposed in old ballast pits by the side of 

 the railway. 



(2.) EASTERN PORTION. 



The eastern portion of the Middle Terrace Drift of Grays is 

 of especial interest since the magnificent mammalian remains 

 and the richly fossiliferous shell beds which made the name of 

 Grays Thurrock famous were contained and exposed in this 

 tract. Now, unfortunately, but little of these beds is left, but 



