The LevensJmlme Limestones. 



349 



At Mr. Wood's boring, in Medlock Vale, near Water- 

 bourne, the base of the Permians was reached at a depth of 

 718 feet 10 inches, and 143 feet 7 inches of Coal Measures 

 were proved beneath ; no limestones occurred, the beds 

 consisting of red, grey, and black sandstones, shales, marls, 

 and fire-clays. These beds are probably below the Ardwick 

 Limestones, and there appears to be little doubt that the 

 Levenshulme Limestones are above those of Ardwick, 

 though belonging to the same physical group. It may, 

 hereafter, be convenient to describe them as the Ardwick 

 and Levenshulme Limestones ; these portions of the Upper 

 Coal Measures obtaining their maximum development in 

 England in the districts so named. 



West of Manchester, the Upper Coal Measures have 

 been proved at several points ; our knowledge of them is 

 largely due to the late Mr. Binney, but has been usefully 

 supplemented by Professor Hull. 



At Patricroft, under the Permian, occurred : — 



Red and grey shales 



Hematite band 



Shales and sandstone 

 Slack Lane Coal 

 Shale and sandstone 

 Worsley Four Feet Coal 



The total depth was 1,324 ft. 3 in. 



The ironstone was identified by Binney as that occurring 

 at Beswick Lodge, just referred to, and he remarks " that 

 both occur in shales containing the bivalve shell Anthrax 

 comya Phillipsir [Named after Dr. Phillips, of Manchester, 

 by Mr. (now Professor) Williamson, in 1836.] 



This calcareous ironstone (22 to 26 per cent of metallic 

 iron) has recently been identified by one of us in a boring 

 for water at Monton, and it doubtless lies over a large area 

 underlying the Manchester Ship Canal. It is worthy of 



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