552 PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [JuHG 20, 



39. That by the Brick-pit on Edingthorpe Heath, 6 furlongs E. by N. of Austin 



Bridge ; a sharp anticlinal a few yards wide brings ^^ to the surface here. 



40. That by Hasborough Cliff. The upper part of g^ here consists of finely strati- 



fied silt, which in places is deeply denuded, the base of h occupying the 

 denuded depressions, in some of which partial bands of brick-earth occur, 

 which form, I believe, the Upper Boulder-clay of Mr. Gunn at this place. 



41 . That by the Cliff north-west of Bacton, east of Field Barn. 



42. That by the Cliffs further west, and N.N.E. of Field Barn. 



43. That by the Cliff near Mundesley. g^^ which has hitherto been regularly 



stratified, begins to become contorted. IST.B. There is a post-glacial bed 

 in the valley at Mundesley. 



44. That by the Cliff near Beacon Hill, Trimmingham. g^ here cuts in places 



through g'^ into g"^ ; the dimensions of the diagram do not permit of 

 this being represented. N.B. g\ which has hitherto been black with the 

 debris of dd, becomes yellow sand and ceases to be laminated. 



45. That by Felbrigg Heath. 



46. That by the Cliff near Cromer, g'^ is here and in Nos. 47 and 48 divided 



from Ti by an indurated gravel-pan. N.B. Between 44 and 46, g' again be- 

 comes stained with the debris of dd and partially laminated. 



47. That by the Cliff near Sherringham. 



48. That by the Cliff near Weybourne. N.B. Midway between 47 and 48, 



g^ begins to lose its contortions, and to become stratified again ; g^ and 

 g^ also become difiicult of distinction, and together to assume the con- 

 dition of chalky loam. 



49. That by Weybourne and Kelling Heaths. 



50. That by Salthouse Heath. 



51. That by various pits in the valley of the Grlaven. g^ and g"^ are here repre- 



sented only by chalky loam, or marl, with occasional beds of chalky sand. 



52. That by Saxlingham Heath (6 miles from Weybourne). 



The section as it stands in No. 52 is continued west to Wells, except that h is 

 almost wholly denuded, g'^ and g^ occupying the surface of the country through 

 Field Balling, Binham Abbey, and Wigton. In a pit 4 furlongs east of Copy's 

 Green, Wigton, a sand comes up beneath g"^ and g^ (which are represented by a 

 sandy chalky loam). This may be the recurrence of ^^ at this part. 



By the Railway-cutting east of Wells Town a very fine section is afforded of 

 g"^ and g^, in the form of a chalky loam resting on the chalk and partially 

 underlain by boulder-gravel. South and south-west of Wells, h comes on again 

 in thickness at HolkJiam Triumphal Arch and near Fakenham. 



By the term "post-glacial" is meant beds that have been deposited sub- 

 sequently to the great denudation which ensued upon the close of the formation 

 of i. None of these appear in the Diagram, which represents the state of things 

 at the commencement of the formation of i. 



It will be seen by the above that the Chillesford beds, e and e\ and the sand- 

 and pebble-beds, /, which, by reason of their strict conformability to the base of h 

 over the crag area, were treated in the '' EemarJcs in exjpJanatiori of the Map of 

 the Upper Tertiaries of the Counties of Is or folk, Suffolk, Essex, Middlesex, Hert- 

 ford, Cambridge, Huntingdon, and Bedford, with parts of those of Buckingham 

 and Lincoln, and accoonpani/ing sections," as belonging to the lower part of h, 

 are no longer so regarded. Their true position in the sequence of deposits has 

 been arrived at by tracing the thick Contorted Drift of the coast, through a 

 series of unequivocal sections, into the comparatively thin bed of brick-earth 

 which overlies the sand and pebble-beds, /, near Norwich. 



This modifies the interpretation put in the " Eemarks " upon Nos. 9, 10, 14, 

 24, and 25 of the sections accompanying them,— -^ in that part of section 9, 

 which is near Norwich, comprising the beds e, e', f and g^ of the above Diagram ; 

 and in the western part of section 10 the beds / and g^, in addition to the 

 Middle Drift h ; while in section 14 it includes at Sudbourn, Aldborough, Thorpe, 

 Easton, and Covehithe the beds e, e', and/; and at Kessingland and Corton the 

 beds g'-^ and h. In section 24, k represents d^' d^', e, and part of e', and in 

 section 25 the beds from the base of /to the middle of h. 



