336 



PROCEEDINGS OP THE GEOLOGICAL SOCIETY, 



usually exceed from 10 to 15 feet in thiclmess, and pass upwards 

 into or are succeeded by the Chillesford Clay. This scciuence is well 

 shown at Chillesford, where I had a trench dug in tlie upper pit 

 by the church down to the Red Crag, so connecting it with the 

 Stackyard pit. The general section thus taken is as under (fig. 18). 



Fig. 18. — Section at Chillesford. 



8. Light-coloured boulder-clay 

 with a seam of broken 

 sheil-fragments at base. 



3. Grey clay with a few shells 

 and fiah-yertebrte, passing 

 down into light-colovired 

 clayey sand, with patches 

 of perfect but friable 

 shells. 



part proved 

 by digging. 



«J 



i= 3'. Yellow sandswitl'.outshella. 



The same with a few shells. 



Seams of ferruginous sands 

 with a few seams of clay 

 and some shells. 



Seams 

 shells. 



of comminuted 



Pebblj' sands. 



Light-brown and iron sand, 

 with a greater variety 

 and more perfect shells. 



Beds of coniminuted shells, 

 with some entire ones. 



The fossils of these Chillesford, or upper Eed Crag, sands are often 

 very few ; and some portion of them may in this district be derived 

 from the destruction of the lower division, in the same way that iu 

 the lower division we find fossils derived from the Coralline Crag. At 

 Chillesford-Church pit, however, we get the fossils proper and pecu- 

 liar to these sands, as it is evidently the spot where they lived *. At 

 Walton a thin seam of undeterminable shell-fragments occurs in 

 places at the base of these sands. At Newbourne I could not di- 

 stinguish between the few fossils of these sands and those in the 

 beds beneath. At Chillesford Stack-pit Scrohicularia piperata is 

 stated by Mr. Searles Wood to be found in the upper part of the 



* For lists of these fossils see Quart. Journ. Geol. Soc. vol. v. p. 350, aud 

 vol. xxii. p. 545 ; also the general list. 



