348 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Mar. 7> 



eight to ten feet. They also stated that m the beds of clay they not 

 unfrequently found large bones. (See Section fig. 3, p. 349.) 



Half a mile westward from this brick-field is Chillesford Church, 

 to the north-east of which and immediately adjoining the church- 

 yard is a pit marked in the Ordnance map as a clay-pit, and present- 

 ing a section of much interest. 



Fig. 2. 

 Section adjoining Chillesford Church. 



a. Light grey conglomerate clay drift and traces of gravel. 



b. Laminated light grey and yellow clayey sands passing 

 downwards into beds more entirely of yellow sands (c) . 

 Shells disseminated irregularly throughout. 



^ 



^S^r^ 



^^ 



^^"^ 





a 



^gS" 







b 



g&" 



_^.r;= 



& 



— — 



-^— - 



— -- __ 



juu=: 



■ 





^^. 



— =-' 



_=-. — 



--=^ 



- ^___ — 





The shells of which we observed but the casts in the preceding 

 pits we here obtained quite perfect, although in a very friable state ; 

 and few broken or imperfect shells were to be seen. Nothing could 

 be more tranquil than the mode in which they were imbedded, — the 

 larger bivalves commonly in their normal position as when living. 

 The species were not numerous, but individuals of many of the species 

 abounded. Those which were found in the greatest abundance were the 

 Cyprina islandica, My a truncata, Tellina obliqua, Nucula CohboldicB, 

 Leda myalis, and Turritella terehra. We also obtained a few small 

 vertebrae of fishes. In this pit the clays and sands do not form se- 

 parate beds, but are more mixed and pass one into the other. No 

 crag beds are exposed in this section, but lower down the hill, close 

 to the main road and at a distance of about 150 yards to the south, 

 is a pit of red crag twenty to twenty-five feet thick, presenting its 

 most marked characters and full of its most common fossils. There 

 is little doubt, I think, of the red crag passing under the beds of 

 Chillesford Church pit at a depth of a few feet. (See Section fig. 3, 

 p. 349.) 



Here we were obliged to conclude our observations, having traced 

 the fossiliferous sands and clays over a district from north-east to 

 south-west of about three miles and a half. Beds of a very similar 

 appearance, but without organic remains, we observed the following 

 day at the brick-kiln one mile north of Aldborough. The coralline 

 crag outcropped at a short distance from it, and on a lower level. 



Early in this month (November 1848) I paid another visit to this 

 district ; but although I traversed it in several directions between 

 Orford, Iken, Tunstall, Chillesford and Woodbridge, yet I met with 

 no sections so illustrative as those I have now described. There 

 were, however, many which would seem to corroborate and extend the 

 structure we noted last spring. Thus in the two sand-pits between the 

 Black Walks Woods and the keeper's house at Iken, the same lami- 

 nated greyish clays from five to ten feet thick are seen overlying the 

 yellow sands, at a short depth below which traces of the red crag 

 have been dug up. 



The excessive wet prevented me from making any complete exami- 



