12 



"Additional Notes on the Drift Deposits near Manchester," 

 by E. W. BiNNEY, V.P., F.RS., F.G.S. 



In my classification of the Drift Deposits of Manchester, 

 printed in Vol. VITI. (second series), is given a fourfold 

 division of the beds, No. 4, or the lowest under the till, 

 being termed Lower Gravel, and described as a bed of sand 

 or coarse gravel having the pebbles contained in it, consist- 

 ing of the same kind of rocks as those found in deposits 

 Nos. 1, 2, and 3, well rounded, sometimes but not always 

 occurring under the till or brick clay. 



Professor Hull, F.E.S., in a paper printed in Vol. II. (third 

 series) of the Memoirs of the Society, states, "Another modi- 

 fication which we found it necessary to make had reference 

 to the lower sand (No. 4) underlying the till in Mr. Binney's 

 classification. We have nowhere been able to discover such 

 a bed in situ during our examination ; and it is remarkable 

 that in the section of the drift which was furnished by Mr. 

 Binney as having been proved at St. George's Colliery, 

 Manchester, and where it is stated that this sand and gravel 

 (No. 4) is lOft. Gin. in thickness, there is no appearance 

 whatever of it in the neighbouring quarries of Collyhurst, 

 where the till may be seen directly reposing on the Permian 

 sandstone. I do not however wish to deny that there are 

 occasional patches of sand or gravel underlying the lower 

 till, because such bands occur in the till itself My only 

 object is to remove this member from the dignity of a dis- 

 tinct subdivision of the drift series, at least till there is 

 some better evidence of its existence than the reports of 

 well sinkers, the elasticity of whose system of nomencla- 

 ture is unhappily proverbial." He then gives his fourfold 

 division. In a paper of my own, printed in the same vol. 

 as Mr. Hull's, a list of eleven drift sections is given in which 

 the lower gravel (No. 4) appears in ten found in Man- 

 chester. 



No doubt, as Mr. Hull states, it is quite true that on the 



