PltESTWICH CKAG-BEDS OP SITPFOLK AND NOEPOIK. 



469 



Norwich Crag to the Westleton beds at the Thorpe pit. The latter 

 there put on the character of a coarse ferruginous shingle passing 

 under the Boulder-clay series higher up the hill; but that is not 

 seen in this pit. The shells of this ferruginous bed (a? 5) consist, as 

 far as they have been determined by Mr. Reeve, of: — 



Cardium edule. 

 Mytilus edulis. 

 Mya arenaria. 

 Tellina obliqua. 



Modiola (large sp.). 

 Littorina littorea. 

 Purpura lapillus. 



There is, however, nearer Norwich, a section which, although 

 wanting in the confirmation afibrded by organic remains', shows in a 

 •very interesting manner the superposition of the whole series, and 

 the relation of diflferent members of the Crag and glacial beds in this 

 district (fig. 39). 



Fig. 39. — Pit at Bishopford Bridge, Norwich. 

 \ 



feet. 



7. Coarse ochreous loamy rough- 

 ly stratified flint-graYel 25 



6. Brown Boulder-clay (lower 

 division) 15 



5 5. White sands and flint-shingle 



(Westleton beds) 20 



3. An irregular seam of grey clay 

 (Chillesford Clay?)^ to 1 



3'(?) 3' (?) & 2'. White and ochreous 

 *5 sands, and flint-shingle and 

 ^ gravel. Small patches of shells 

 (Norwich Crag) found occa- 

 sionally in the lower part, and 

 lalk. large flints at the base 12 



