110 



PEOF. J. PRESTWICH ON THE RELATION OF THE 



Besides these constant constituents, I found in this shingle, which 

 is sometimes concreted by iron-peroxide, some large subangular 

 fragments of a fine-grained granite and mica-slate ; and Mr. Eeid 

 mentions the occurrence of " a boulder of greyish granite measuring 

 2 X If feet among the clay pebbles and bones," at the base of the 

 Series, a short distance eastward of E-unton Gap (p, 28). 



Pig. 8. — Section at West-Runton (or Woman-HytJie) Gap. 



feet. 



a. Subangular gravel 8 



h. Chalk-rubble 5 



c. Sand and gravel, with patches of broken shells 6 



d. Boulder-clay 15 



e. Sand and ironstone 2 



/. Light-coloured sands 6 



g. Loamy sands, very variable, with a few shells in position 3 



h. Shingle, with shells mostly in fragments 4 



i. Fine sand, variable 2 



j. Peaty bed, with freshwater shells 2 



The position of the Crag bed described by Mr. Eeid is shown in faint outhne 

 below the base line on the left, g is not carried far enough. 



The section at the Gap (fig. 8) does not show the beds down to the 

 Chalk, but this is shown by the sections in faint lines which are 

 given beneath. 



This brings us to the moot point concerning the age and relation 

 of the so-called Weybourn Crag to the other Crags. According to 

 Mr. S. Y. Wood it is synchronous with the Bure- Valley Crag or the 

 Pebbly Beds, and therefore newer than the Forest-Bed Series ; whereas 

 Mr. Reid places it at the base of, and consequently as older than, 

 that Series, although still newer than the Norwich Crag. Mr. H. B. 



