[ro/«ct page 274. 



Comparative Sections of Devonian, Old Bed Sandstone, and Carboniferous Formations. 



SOUTH OF lEELAHD. 



NORTH DEVON. 



HEREFORDSHIRE So. 



rasBage- and Ul»lJCrSilu- 



Greaf 



f 



Irelamci 



Carboniferoas Ximcstone. 

 (Slate. 

 Lower Carboniferoua 

 Coomhola Grita, &c. 



EUtorcau bed8. 

 Red Sandstone 



Middle Devonian (c) 



Lower Devonian (i) 



^^^^ 



Slates. 

 Ludlow and Wcnlock bcda. 



Pilton beds. 

 Marwood beds. 

 Upcot Flags. 



Pickwell-Down Sandstone, 



Mortehoe Slates, 

 beds. 



Lower Limestone Shale. ^ '\ '.' ■ i -^ '. '- ^'. - ' i=^ 



Old Bed Coaglomerate. 



Paaaage-beda 

 Upper Ludlow 





Carboniferoua Limestone. 



SuhiBtes de Fomenne 

 Oalcaire de Frasne. 



Oolcaire do Givet. 



Pondingue de Bumot, 



I Lower Silurian beds. 



