128 MR. W. BROCKBANK ON THE 



along the face of the outcrop or near it ; and the strata 

 being much disturbed, it is impossible to say the exact 

 thicknesses of limestone seams or if there were more than 

 two or three. It would be very desirable to put down a 

 bore-hole or to sink a shaft at a suitable point, so as to 

 prove exactly the stratification at this place. Any detail- 

 sections, such as those now submitted to the Society, must 

 be taken as merely diagrams built upon the evidence 

 above stated, and not as actual records of ascertained 

 facts. 



When the Levenshulme limestones were first discovered 

 specimens of them were sent to Owens College, and 

 Professor Boyd Dawkins at once pronounced them to be 

 Ardwick limestone, and belonging to the Upper Coal- 

 measures, chiefly because they contained the Spirorbis 

 carbonarius. 



For my own part, I prefer to call them the Levenshulme 



limestones, and to class them as Permian, following Mr. 



Binney in his description of what I take to be a similar 



limestone, shown in his Heaton Mersey section, about two 



miles to the southwards, and thrown up by the same fault. 



I am aware that, judging by the fossils named by Mr. 



Dawkins, the limestone may be classed as a member of 



the Upper Coal-measures. But we have here at Withington 



a regular sequence of Permian red measures ending in the 



Levenshulme limestone, which is again underlain by red 



clays, as at Heaton Mersey ; and I therefore consider the 



lithological evidence to be in favour of its being a Permian 



limestone. It is a subject quite open to discussion before 



we consent to differ from Mr. Binney's ruling ; but I do 



not propose to discuss it further at this time. 



A considerable quantity (twenty tons or more) of the 

 Levenshulme limestone blocks have been removed to my 

 garden, at Brockhurst, Didsbury, where they are perma- 



