OOLITIC GROUP. 



61 



OOLITIC GKOUP. 

 Calcaire Jurassique. Jurakalk. 



Conyheare. Roemer. IfOrbigny. 

 g f Portland Stone and Sand. Portland Kalk. L'etage Portlandien. 

 i! 1 Kimmeridge Clay . . . Kimmeridgien. 



f Coral Rag. 

 1 Oxford Clay 



f Combrash and Forest 



Marble . , . 

 Great Oolite and 

 Stonesfield Slate 



Fnller's Earth and 

 Inferior Oolite . 



Lias . . . 



Korallen Kalk. 

 Oxford Thon . 



Walier-Erde | 

 Dogger, 

 UnterOolith. J 

 Lias-Ealk . — 



Corallien. 

 Oifordien. 



Bathonien. 



Liasique. 



The OoUtic Group which forms so conspicuous a portion 

 of the physical structure of England, traversing the island 

 as a wide central but oblique band, from Yorkshire on the 

 north-east, to the Dorsetshire coast, may be stated, in a 

 general manner, (although it is not uniform throughout,) 

 as composed of two groups of strata, the one consisting 

 chiefly of coarse, somewhat crj'staUine, shelly, oolitic lime- 

 stone, Tisith alternations of sandstones, marls, &c., which 

 form the Upper, Middle, and Lower ridges of the Oolites, 

 separated by distinct bands of dark coloured clays, known 



