﻿Clement Reid-^PUocene Beds near Cromer. 



Lower Boulder-clay has always 

 sliown me a sharp and well- 

 marked line of division, and 

 neither Mr. H. B. Woodward nor 

 myself have been able to see 

 any alternation of these sands 

 with the Cromer Till, such as 

 is mentioned by Messrs. Wood 

 and Harmer as exhibited in the 

 Norfolk cliffs.^ For this reason, 

 and on account of the absence 

 of glacial action (other than per- 

 haps that of river ice) in any 

 of the beds described, I have 

 thought it advisable to draw the 

 line mai'king the commencement 

 of the Glacial Period at the base 

 of the Lower Boulder-clay — a 

 line which I may mention has, 

 on independent evidence, been 

 taken by Mr. H. B. Woodward 

 in the neighbourhood of Norwich. 

 The subjoined table will show 

 the different stages of what may 

 be well termed the Norfolk Crag. 



Lower Boulder Contorted Drift and 

 clay. Cromer Till. 



( Myalis Beds. 

 I Freshwater Bed. 

 I Wej'bourn Beds and 



Norfolk Crag ■{ Forest-bed. 



1 ChiUesford Crag.2 



I Norwich Crag proper, or 



L Fluvio-marine Crag.^ 



The accompanying section will 

 show the relations of the several 

 divisions of the Pliocene Strata in 

 the Cliffs between Sidestrand and 

 Weybourn. The Glacial Beds, 

 with the exception of part of the 

 Lower Boulder-clay, are omitted, 

 as they could not be shown on the 

 exaggerated scale in the right 

 pi'uportion to the other strata. It 

 will be observed that the Lower 

 Boulder-clay occasionally scoops 

 down to the Chalk, as at Beeston. 



Siipp. to Crag Mollusca, Introduction, p. xviii. 

 Not shown iu the Cromer Cliffs. 



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o 



l-H 



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en o 



5a 



mm 



DECADE II. — VOL. IV. — NO. Til. 



20 



