Reports mid Proceedings — Geological Society of London. 187 



The supposed Torridomaii rocks of Colonsay exhibit in their folding 

 and cleavage the effects of two movements analogous in their results 

 to those proved by Mr. Clough in the Cowal district of Argyll. Not 

 only the planes of the first or slaty cleavage, but also the quartz veins 

 formed along them have been folded by the second movement, and 

 may be observed to be crossed at considerable angles by the cleavage 

 produced during this second movement. An extensive series of 

 iamprophyre d3^kes, obviously later than the first cleavage, are found 

 to be fokled and cleaved by the second movement. Moreover, some of 

 these dykes traverse and are chilled against a mass of syenite, which 

 can also be proved to be later than the first cleavage. The distinctness 

 of these two movements is, therefore, considered to be completely 

 established. The second cleavage being of the nature of strain slip, 

 its development along the axial planes of the folds is of interest and 

 is briefly discussed. 



2. " Notes on the Eiver Wey." By Henry Bury, M.A., F.L.S., 

 F.G.S. 



The part of the River Wey within the Wealden area is divided into 

 six sections : (1) The consequent river ciitting the Chalk at Guildford ; 



(2) the subsequent stream coming in from the east at Shalford; 



(3) the western subsequent stream parallel to the Hog's Back ; (4) the 

 continuation of the last westward (the Tilford River), rising, at 

 Selborne and receiving many tributaries, including the Headley River, 

 from between Blackdown and Hindhead ; (5) the short obsequent 

 section from Farnham to Tilford (the Waverley River) ; and (6) the 

 portion above Farnham coming from Alton and beyond (the Farnham 

 River). Part 1 deals with the relation of sections 6, 5, and 4 to 

 the Blackwater. It is assumed that there was a consequent river 

 coming down from Hindhead, flowing northwards along the " Wavei'ley 

 River," and joined by the Farnham, Tilford, and Scale rivers. This 

 seems to have been the original head of the Blackwater. But 

 subsequently capture took place by section 3 of the Wey, with the 

 result that the Tilford River passed into the Wey basin, and section 5 

 was thus beheaded. The development of an obsequent stream near 

 the course of the last eventually tapped the Farnham River, but not 

 the Scale. 



Part 2 deals with the Palaeolithic Gravels of Farnham. Their 

 height and distribution is discussed, with a view of determining the 

 river which originated the gravels. The ridges constituted by the 

 gravel drop to a lower platform along the Waverley River : this is 

 regarded as the left bank of the consequent valley before that was 

 beheaded. If this were the case, the gravel would have been formed 

 by the Farnham JHiver while still tributary to the Blackwater. At 

 this time, too, probably the Headley tributary drained into the 

 Farnham, and not the Tilford River, giving rise to the south-western 

 portion of Alice Holt. 



Part 3 deals with the Farnham branch of the Wey and the Alton 

 district, which is remarkable in that there is a complicated series of 

 Chalk valleys, which spread over- some 50 square miles of country 

 and discharge their waters into the Wealdeu area. One possible 



