224 MR. E. W. BINNEY ON THE PERMIAN BEDS 



From Failsworth to Giant's Seat Lock on the Bury Canal, 

 near Ringley, little if any of the district has been proved by 

 boring, to discover if the permian beds occur or not ; but I 

 am inclined to believe, from their regular occurrence all the 

 way from Beet Bank Bridge to Jericho Clough, and probably 

 Failsworth, that they also exist under the drift in a similar 

 position west of Moston Colliery, under Heaton Park and 

 Prestwich, and thence to the valley of the Irwell at Giant's 

 Seat. 



The carboniferous strata, seen in the Medlock at Ardwick, 

 were generally supposed to be the highest part of the coal- 

 measures found in Lancashire, but Mr. Mellor has lately 

 shewn me that he has met with beds containing two or three 

 limestones in them considerably higher in position ; therefore 

 it is probable that the carboniferous strata may yet be traced 

 further up in the series still, under the permian deposits. 

 Assuming the blackland ironstone, lying above the main lime- 

 stone at Ardwick, to be identical with the same deposit 

 (Bassy mine) in the Pottery coal-field, near Burslem, there 

 are several hundred feet of red and purple coloured clays, 

 containing thin beds of pebbly gritstone, under the permian 

 beds, and not exposed in the vicinity of Manchester. 



COLLYHURST SECTION. 





Vi 



N.N.E. 2 8 S o & Iw S.S.W. 





Middle coal-field. 



This extends along a line from the Manchester Exchange 

 to Mr. David Morris's mill in the Smedley Valley below 

 Harpurhey. 



