13 



Permian sandstone in the Vauxhall delpli at CoUyhurst the 

 till is seen resting upon that rock without any intervening- 

 bed of sand or gravel ; but if any one considered the ex- 

 posed position of the rock at the last named place when 

 compared with the sheltered locality at St. George's Col- 

 liery, there would be no difficulty in conceiving that a bed 

 of sand or gravel might be removed by denuding causes 

 in the former, while it would be preserved in the latter. 

 Certainly this deposit was not given on the authority of an 

 ignorant well sinker, but on that of the late Mr. Thomas 

 Hill, an intelligent colliery manager, who was not likely to 

 be deceived in the change of a bed of till to 10ft. Gin. of 

 sand and gravel. 



In my first paper previously referred to ten other instances 

 were given of the occurrence of the lower gravel under the 

 till in and near Manchester, and in the Additional Notes 

 on Drift printed in the last two vols, of the Proceedings of 

 the Society other cases are given of the bed having been 

 found under. 



In the present communication more sections are brought 

 forward, the first three of which are from my own obser- 

 vation. 



In Dantzic-street near the corner of Wells-street, Shude- 

 hill, the following beds were met with : 



ft. in. 



Till 18 



Coarse Gravel 3 6 



Broken Rock — Trias 3 6 



25 

 The gravel contained rounded pebbles of the size of a 

 man's head, and is of a coarser description and a duller colour 

 than I had ever previously observed in the neighbourhood 

 of Manchester. 



At the south end of George-street near Oxford-road, 



