The Levenshulme Limestones. 283 



Measures at Collyhurst, and a report upon this by Mr.Binney 

 ivas published in the British Association reports, 1862. 

 This excavation was visited by many of the leading 

 geologists of that day, as it opened out a section not 

 otherwise to be seen in England, and helped to clear up a 

 very interesting problem in geology, which was afterwards 

 fully solved by Sir Roderick Murchison. Previously to the 

 ■excavation of this deep cutting, made, purposely, at Tinker's 

 Brow, Collyhurst, the absolute point of contact had not been 

 seen. The Permian strata were found to be dipping at an 

 angle of 18°, and the Coal Measures at an angle of 24°. 



What was thus indistinctly seen at Collyhurst in 1861, 

 has been most fully displayed in the railway cutting at 

 Levenshulme, and has afforded an opportunity which may 

 never occur again of seeing a complete section of Coal 

 Measures underlying the Permians. The latter consists at 

 Levenshulme of the "Lower Red Sandstone," of Tinker's 

 Brow, Collyhurst, as it was called in Mr. Binney's time. 

 The beds in contact with it belong to a somewhat 

 ihigher portion of the Upper Coal Measures, and are, 

 therefore, of great interest, being possibly the highest Coal 

 Measures known in England. Leaving the description of 

 the junction with the Collyhurst Sandstone of the Permians 

 for our next paper, we will proceed at once with the purple 

 beds which underlie them, and which, though undoubtedly 

 of Upper Coal Measures age, are to some extent of a 

 transitional character. 



The purple beds which immediately underlie the Permian 

 Strata near Slade Lane, and which are the uppermost of the 

 Upper Coal Measures, remind one of us of the breccia or 

 brockram, which always forms the lowest member of the 

 Permians in the North of England. Here, however, the 

 Permians commence otherwise, but the uppermost 

 member of the Carboniferous strata has the brecciated 

 character strongly marked. It has a deep purple colour. 



