Plate Y 



THE THAMES 



LONDON 



Ifortli Downs 



OF CotOXJRS. 



r! 



Bagshot Beds 



LONDON CLAY 



AND LOWER 



ionvoN Tcrtiahies 



Chalk 



Gpeensand 



(upper » LOWER) 

 /LND CAULT 



WZALD Clay 



Hastings Sand 





OOUTE 



Lias 



Trias 



SeaXeveL 



'is THE Thames Basin 



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