DIVISIONS OF THE BRITISH STRATIFIED 



ROCKS 



Cainozoic or Tertiary 



Pleistocene . 



Pliocene 



Miocene (not 

 Oligocene .... 



Eocene 



J Post-glacial deposits (river-gravels, cave-deposits, etc.) 

 | Glacial deposits (Boulder Clay, etc.) 



Forest Bed Series 

 Norwich Crag Series 

 Red Crag 

 Coralline Crag 



found in England) 



Hamstead Beds 

 Bembridge Beds 

 Headon Beds 



' Bagshot, Barton, and Bracklesham Beds 



London Clay 



Oldhaven Beds 



Woolwich and Beading Beds 

 V Thanet Sands 



Mesozoic or Secondary 



v er ) Chalk 



| Gault and Upper Greensand 

 J Lower Greensand 



Cretaceous 



Lower 



Upper 



Jurassic 



I Wealden 



fPurbeckian 

 Portlandian 

 Kimeridgian 

 Corallian 

 V Oxfordian (with Kellaways Bock) 

 / Cornbrash 

 Forest Marble 



Middle., 



Great Oolite 



Series 

 (Bathonian) 



V Lower 



Bradford Clay 

 Great Oolite 

 1 Stonesfield Slate 

 Inferior Oolite I Fuller's Earth 

 Series \ Inferior Oolite 



(Bajocian) I Passage beds (sands) 

 Lias 



