128 MR. E. W. BINNEY ON THE TRIASSIC AND 



The dip of the Permian strata was about i in 8^ and 

 that of the Upper Coal Measures i in 3, to the S.S.W. 



The strata found resemble those at Medlock Vale, except 

 that the Permian sandstone has increased from 420 to 752 

 feet in thickness. I have estimated that rock under Man- 

 chester at 400 feet ; but its entire thickness has never to 

 my knowledge been proved. In Chester Street, Chorlton- 

 upon-Medlock, at the sugar-works of Messrs. Fryer & Co., 

 on the south side of the fault which runs from N.W. to 

 S.E. between that place and the late Mr. Greenes dye- 

 works in Brook Street, the Permian marls and conglome- 

 rate bed, increased to 260 feet in thickness, were found 

 resting on upper Coal Measures containing the Spirorbis- 

 limestone similar to that at Ardwick, without any trace of 

 the Permian sandstone. Similar results have been found 

 at the borings and sinking of the Seedley print-works and 

 the Patricrof t colliery ; and very lately Dr. Perrin informed 

 me that the same occurred in a sinking at Plank-lane 

 Colliery, near Leigh. 



All the facts hitherto observed appear to show that the 

 Permian sandstone is found of great thickness under the 

 district lying between the Manchester coalfield and that of 

 Ashton-under-Lyne and Oldham, while to the south of 

 Manchester, under the Trias, it is replaced by the con- 

 glomerate of increased thickness. The former rock has 

 probably never been deposited ; nevertheless the fact of its 

 general absence is of great importance to all parties who 

 may sink for coal under the Trias. 



At the present time the Permian strata of the N.W. of 

 England and the S.W. of Scotland, so far as my knowledge 

 extends, are represented in Lancashire in the following 

 descending order : — 



I. Upper Permian sandstone of Moat, Shawk, St. Bees, 

 and Furness Abbey; absent in South Lancashire, unless 



