GEOLOGICAL NOTES FOR A VISIT TO ROTHLEY CRAG. 279 



as far as the Simonside Hills and the Cheviots, and there- 

 fore embraces the outcrops of the whole of the " Bernician " 

 and "Tuedian" rocks, which together make up the Lower 

 Carboniferous deposits of Northumberland. 



The following table will show at a glance the position which 

 the grits of Rothley hold in the series, viz. : — 

 Coal Measures. 

 Millstone Grit. 

 Upper Bernician. 



Felltop Limestone. 



Sandstones, shales, thin occasional coals. 



3rd. Intercalated Limestone. 



Sandstones, shales, thin occasional coals. 



2nd. Intercalated Limestone. 



Sandstones, shales, thin occasional coals. 



1st. Intercalated Limestone. 



Sandstones, shales, thin occasional coals. 



Little Limestone. 



Shale and sandstone alternating. 



Coal (the "Little Limestone Coal," upper ~| 

 portion of seam, thin). 



" Black and Grey Freestone "=sand- 



stone 6 feet 



"Black Metal "= shale 3 ,, 



"Black Stone "=hard shale i ,, 



"Grey Stone "=shaly sandstone 5 ,, 



"Black Stone " = shale i^ ,, 



White sandstone 14 ,, 



Shale I9i ,, 



"Whinstone"=hard compact sand- 

 stone l| ,, 



" Grey Slate "=compact shale 7^ ,, 



Coal (the "Little Limestone Coal," 



lower portion). If ,, 



Fireclay i , , 



Shale and sandstone alternating, including the Inghoe Grits of 

 which the Rothley Crag is composed. 



Shale (thick). 



Great Limestone. 



Many hundred feet of sandstones, shales, limestones, and coals. 



The Ridsdale Limestone and Ironstone Shale. 



This set of beds is 

 extremely variable, in 

 some places wanting 

 altogether, in others 

 considerably thicker, 

 (the seams of coal in 

 some places coales- 

 cing into one, at 

 others splitting into 

 three. 



