28 PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. [NoV. 22. 



question their bearing any relation to the sands which usually underlie 

 the Boulder-clay, and which Mr. Wood has called " middle drift." 

 Indeed, I believe that he feels that difficulty himself, for he is unable 

 to make a separation between these unproductive sands and the 

 phosphatic nodule-band, and yet he evidently shrinks from dissoci- 

 ating that peculiar band from the general deposit of the Red Crag. 

 He says, ''I incline strongly to a belief that this horizontal Crag is 

 merely the redeposit of the material of the Red Crag beach, washed 

 up on the submergence of the Crag beneath the middle- drift sea;" 

 though further on he adds, " but in the case of the horizontal Crag or 

 nodule-band, this dissociation" — of the nodule-band from the Red 

 Crag — "seems difficult to arrive at"*. 



My own impression is that the mass of sands met with between 

 the Boulder-clay and the Red Crag belongs to several deposits of 

 different ages. The unproductive sands of the Crag, which are of a 

 peculiar unctuous character, are one deposit. The laminated brown 

 and yellow sands seen, for instance, about Aldringham Common, 

 in which I found Mytili abundant, are another, and I suspect belong 

 to the " laminated beds " of Mr. Gunn, which underlie the Norfolk 

 Till. "We have still a third deposit of sand in the " middle drift," 

 overlying these, and containing those beds of rounded pebbles which 

 have contributed chiefly to form the beach of the Suffolk coast. 



I believe that all these sands may be seen emerging from beneath 

 the Boulder- clay in the interval between "Westerfield and Bealings 

 stations on the East Suffolk railway. 



* Remarks, &c., pp. 5 & 6, 



