OF THE NOETH-WEST OF ENGLAND. 257 



I am aware that the veteran geologist of Ireland, Dr. 

 Griffith, F.R.S., and Professor Mc. Coy are inclined to 

 consider this limestone yellow sandstone, but Mr. Mc. Adam, 

 a good local geologist, who has often investigated the section, 

 has no doubt as to the bed being true magnesian limestone ; 

 Professor William King, whose knowledge on such a point is 

 of the highest value, is also of the same opinion ; so I think 

 Ireland will still retain in its geology this small portion of 

 magnesian limestone, none other having ever to my know- 

 ledge yet been met with in the whole country. 



KiRKBY Stephen and Brough Sections. 



In the upper part of the valley of the Eden, lying between 

 Kirkby Stephen and Brough, is a very interesting deposit of 

 calcareous conglomerate, somewhat similar in appearance but 

 of far greater thickness and importance than the one pre- 

 viously described at Barrow Mouth. This valley from the 

 sea to the south of Appleby more or less shews the presence 

 of the upper new red sandstone, but, so far as my knowledge 

 extends, no trace of the permian beds has been met with in 

 the district until we reach the neighbourhood of Brough. 

 From this last-named place to Stenkreth Bridge, beyond 

 Kirkby Stephen, they occupy a considerable extent of coun- 

 try, evidently lying in a trough of carboniferous limestone, 

 and displaying themselves in the brook and river courses, 

 overlying the carboniferous limestone ; but not affording any 

 section which I am aware of that shews their relation to the 

 overlying upper new red sandstone. 



I use the term conglomerate in this district, as well as at 

 Bedford and Sutton,* to characterise the deposit, as being 



* Specimens of the Bedford and Sutton stones in my cabinet scarcely can be 

 distinguished from those found at the base of the magnesian limestone, at 

 Kirkby Woodhouse, Nottinghamshire, and described by Professor Sedgwick in 

 his paper on the magnesian limestone of the north of England. 



2 K 



