74 SECTIONAL ADDRESSES 



Boulder Clay upon which it sometimes rests. In its erratics, as also 

 in the mineral composition of its matrix, it resembles the Hessle Boulder 

 Clay of the coast-sections of Yorkshire, a deposit which lies above the 

 Upper Purple Boulder Clay. The easternmost exposure of this Brown 

 Boulder Clay is seen at Morston, near Blakeney, where Mr. Solomon 

 has demonstrated that it overlies a raised beach, which in turn fringes 

 and is banked against the western edge of the Blakeney Esker and Cromer 

 Moraine. Obviously, this important discovery shows that the raised 

 beach is later than the disturbance that produced the hummocks of 

 Contorted Drift, and also than the Ridge (Cannon-shot) gravels ; still 

 younger, therefore, is the Brown Boulder Clay. Mr. Solomon argues 

 that the Brown Boulder Clay cannot have been produced by the same 

 glaciation as the Upper Chalky Drift — a conclusion supported by the 

 fact that no Brown Boulder Clay or its outwash material is found in the 

 Cromer Moraine. 



At several sites in or near Hunstanton Mr. Reid Moir has found 

 Middle Aurignacian burins, scrapers, points and cores in the Brown 

 Boulder Clay. At one of these, the Gasworks Pit, the arrangement 

 of glacial gravels, boulder clay and made ground is somewhat confused ; 

 at another, the section at the southern end of the Esplanade, the Boulder 

 Clay bed from which he actually obtained the implements has since 

 been removed in the course of ' improvements.' The state of pre- 

 servation and patination of the implements is similar to that of other 

 flints in the Brown Boulder Clay. Thus we have here evidence of a 

 glaciation subsequent to the occupation of the area by Aurignacian Man, 

 but a glaciation which, as shown by the thinning oflF of the Brown Boulder 

 Clay, did not reach farther south-eastwards than the north-western 

 margin of Norfolk. That this glaciation is not likely to be the same as 

 that which produced the Upper Chalky Drift and Trail of Suffolk is 

 indicated by (a) the absence of Brown Boulder Clay and its outwash 

 material in the Contorted Drift and Ridge gravels, and (b) the evidence 

 of an interval between these deposits as represented by the raised beach 

 of Morston. Were it not for this raised beach, however, we might be 

 tempted to regard the Upper Chalky Drifts and Coombe Rock with 

 their derived Mousterian and Levalloisian implements as the extra-glacial 

 phenomena of the Brown Boulder Clay ice, due to snow-sludge and 

 slumping under cold conditions. 



Such, then, is the most complete succession in England of glacial and 

 other deposits associated with the remains of Early Man — a succession 

 to which the term ' standard ' may reasonably be applied. The attempt 

 to trace the succession throughout England and Wales is probably 

 worth while, although we shall find that, in the present state of our 

 knowledge, and perhaps because of the less favourable conditions for 

 the preservation of the remains of plants and animals and Man, minor 

 difficulties of correlation have still to be faced. 



Lincolnshire. 

 In endeavouring to recognise our sequence in Lincolnshire we have 

 to travel to Kirmington, in the vicinity of the Humber, before reaching 



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