Vol. 59.] 



THE ASHBOURNE AND BUXTON EA1LWAY. 



339 



Section showing the junction of the Yoredale Beds and Mountain- 

 Limestone at the southern end of Newton-Grange Cutting. 



Thickness in 



feet inches. 



Contorted shales, not measured — — 



Limestone with Troductus 2 



Shale 10 



Thin limestones and shales 3 



Shale 2 6 



Thin limestones with shale-partings 5 



Do. Do. Do. (1045) 1 4 



Yellow tuff, the greater portion decomposed to a 

 clay, but in places less weathered and blue in 



colour (1046) 6 



Shale 1 3 



Thin limestones 1 6 



Soft black shale 2 3 



Thin limestones 2 



Shale 3 



Limestone with Productus 1 4 



Limestone and shale | 



One of the limestones thins out, and is replaced by I 3 10 

 shale a few feet away on the same horizon. J 



Laminated limestone (1047) 8 



Shale 2 



Fossiliferous limestone ....'. 6 



Shale 2 



Limestones with shale-partings 3 



Shales, mostly black 9 



Blue limestone (1049) , 3 6 



Chert-band 2 



Blue limestones, with bands of chert and shale-partings 30 



Blue limestone 4 



Yellow limestone 1 



Blue limestone and chert, with very thin shale-partings 16 



Blue limestone with chert-band, shale almost absent 16 



Blue limestone with chert-bands, lowest beds reached 28 



Total thickness of beds seen 147 11 



In the northern limb of the anticline the following beds were 

 measured : — 



Thickness 

 in feet. 

 Grey encrinital limestone, the encrinites being larger and. 



more numerous near the top 47 



Blue limestones with chert-bands 60 



Total thickness of beds seen 107 



The beds of limestone at the northern end of the cutting are, 

 therefore, about 40 feet below the lowest of the shale-beds seen at 

 the southern end. At the centre of the anticline the beds were seen 



1 The numbers in parentheses throughout this paper refer to those of the 

 rock -slides in my collection. 



Q.J. G. S. No. 235. 



2b 



