found in Cambridgeshire Gravels. 535 



great height above it, in a continuous band, parallel with and lying to 

 the south-west of the stretch of plateau gravels. 



The plateau gravels at Barrington Hill are at a height of over 

 350 feet above sea-level, those on the Gog Magog Hills about 225 feet 

 above the same level. In the Survey Memoir they are described as 

 occurring at a lower level to the north-west of Barrington Hill, falling 

 to their lowest point east of Babrahara, and gradually rising again to 

 the top of the Gog Magog Hills. It is in the tract whore the gravels 

 are at a lower level that the implement was found, and the fall of 

 level between the gravels capping Barrington Hill and those which 

 yielded the implement occurs in a comparatively short horizontal 

 distance. 



There is more than one view as to the origin of the plateau gravels, 

 but whichever we accept it seems improbable that these gravels should 

 contain implements, and I think that at any rate part of the gravel 

 patch north-east of Hildersham and part of the spread of similar 

 gravels north-east of Little Abington do not belong to the plateau 

 gravels but consist of gravels of the Ancient River System. They are 

 found flanking the ridge some distance below its summit, whereas the 

 plateau gravels on Barrington Hill and the Gog Magog Hills cap the 

 hill-summits. I believe, therefore, that further work will prove that 

 two distinct gravels have been mapped as plateau gravels, and that 

 the implement-bearing gravels will be found to have been deposited 

 against the older plateau gravels. 



Before visiting the pit in which the implement was found we 

 examined two pits close to " Sand Pit Plantation" (see 6-inch map), 

 half a mile north-north-east of Lay Rectory Farm, Little Abington, and 

 situated about the level of the 200-foot contour-line. One of these 

 pits contained chalky drift with many foreign boulders ; the other, only 

 a few yards away, showed coarse angular gravel and beds of angular 

 flints with finely laminated red-brown and yellow-grey sand. The 

 gravel here preponderated over the sand. The relationship between the 

 deposits in the two pits was unfortunately not seen. The beds in the 

 latter pit strongly resemble those of other exposures of river gravels. 



The implement which forms the subject of this communication was 

 found in a pit on the west side of Furze Hill, north-east of Hildersham, 

 about 200 yards north-east of the road flanking the south-west side of 

 the hill. This pit is also situated about the level of the 200-foot 

 contour-line. The section seen in it was as follows : — 



6. About 10 feet of angular flint gravel with seams of bedded sand. 



5. About 4 feet of bedded brownish-red sand with scattered flints. 



4. 6 inches of sand with small flints. 



3. 2 feet of bedded brown sand. 



2. 6 inches of sand with small flints. (The implement was close to the top of 



this bed.) 



1 . 3 feet seen of bedded brown sand, the beds below this being concealed by talus. 



There is little doubt that these sands and gravels were once con- 

 ti nuous with the similar deposits in the gravel-pit north-north-east of 

 Lay Rectory Farm. The two deposits are quite similar in every 

 respect save that in the Hildersham pit the proportion of sand to 

 gravel is somewhat greater than in the farm pit. 



