AL MAP 



BASED ON THE MAPS OF THE GEOLOGICAL SURVEY 



EXPLANATION Of COLOURING 

 RECENT! \Mburuan. 



Oxford, day 



CombrasK 



Great OoUie Series 



Inferior Oolite 



Upper Lias 



M-UUl&Lias 



Lower Lias 



Keeper Red Marh 

 Sandstone 



Bunfer- Sandswne 

 and Pebble Beds 



Maqnesia/i. Lung, stone 

 fcnwia anJ Sandstone, 



Coal Measures 

 i Grit 

 Ton-dale 

 Carboniferous Limestone 



PRE- I I Pre. -wmbriari and 



CAMBRIAN | -_ MetamorptvUi 



County Boundary shown thus 



COUNTI ES OF ENGLAND 



