92 Reports and Proceedings — Geological Sociefg of London. 



I. — Gkological Society of London. 



Decemler 20, 191 1.— Professor W. W. Watts, Sc.D., LL.l)., M.Sc, 



F.ll.S., President, in the Chcair. 



The President, in announcing the decease of Sir Joseph Dalton 

 Hooker, O.M., at the a^e of 94, drew attention to the long 

 connexion of that illustrious man of science with the Society, of 

 which he was elected a Fellow no less than sixty-five years ago, 

 in 1846; and stated that the Council had passed a resolution of 

 condolence and synipathj-, which had heen forwarded to Ladj^ 

 Hooker. (See Obituary, Geol. Mag., January, 1912, p. 47.) 



The following communications were read: — 



1. "The Glacial Sections at Sudbury (Suffolk)." Bv the 

 Rev. Edwin Hill, M.A., F.G.S. 



The sections round Sudbury were described in two Geological 

 Survey Memoirs : since the date of publication of these much more 

 has heen disclosed. A list is given of the principal sections now 

 existing, with references to the descriptions in the Survey Memoirs 

 and notes of those that are there undescribed. 



The paper gives an account of a series of sands and silts, which 

 lie at about 200 O.D. on each side of the present Stour Valley. 

 They seem to indicate sludlow-water conditions at a level more 

 than 100 feet above the present valley-floor. 



On the silts lies Chalky Boulder-clay. The transition from silt to 

 clay is continuous, and seems to show that, here, tlie transition from 

 formation of silt to formation of Boulder-clay was a continuous 

 transition. The undisturbed condition of the beds indicates that 

 during this transition there was no action of thrust or drag. 



At lower levels, from 180 O.D. down to 100 O.D., on the flanks of 

 the valley lie coarse gravels and sands, with current-bedding, which 

 point to torrential water-action. Among these occur displaced masses 

 of previously formed Boulder-clay, some contorted — as if by slip down 

 slopes. At Little Cornard brickworks there is associated with current- 

 bedded gravels a clay, in which are embedded very large masses of 

 remade chalk. 



The deduction from these facts is that at Sudbury, Boulder-clay 

 began to be formed where there was quiet water, which stood on both 

 sides of the valley at a level of over 120 feet above the present floor; 

 and that, after such clay had been formed, there came to be strong 

 currents into or along the valley, at various lower levels. 



These deductions agree with the 'probable course of events, if 

 a submergence preceded the Chalky Boulder-claj' and an emergence 

 followed it. 



The Secretary read the following remarks received from Professor 

 T. G. Bonney : — 



' ' Unfortunately an engagement on Wednesday evening, made before I knew 

 that this paper would then be read, prevents me from being present. That 



