1868.] 



TOPLEY BAS-BOULONNAIS. 



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Weald, and I have always on search - 

 ^ ing found it in the Boulonnais. 

 6 In the foregoing paper the uncon- 



§0 formity of the Cretaceous beds to all 

 •C below them has been illustrated in 

 a many ways. Mr. Hopkins and Mr. 

 J Godwin-Austen have already so fully 

 described this fact to the Society that 

 ^ I will only, in conclusion, call atten- 

 tion to the accompanying diagram, in 

 r^ which the chief facts are represented, 

 -c viz., 1st, the unconformity of the 

 'rt Oolitic beds to the Palaeozoic rocks ; 

 •^ 2nd, the unconformity of the Cre- 

 ^ taceous beds to the Oolites, the 

 t^ Wealden resting on all in succession 

 until they thin away against the 

 ^ 6 Palaeozoic rocks; and, finally, the com- 

 '^ I plete conformity that appears between 

 p; J all the represented members of the 

 S: ^ Cretaceous group, although some are 

 absent. 



Discussion. 

 Sir RoDEKiCK MuRCHisoN, without 

 doubting the correctness of the 

 author's views, wished that fossil 

 evidence had been forthcoming to 

 identify more conclusively the Weald- 

 ^ en strata of the Boulonnais with 

 I ^ those of England, and suggested their 

 '"' rS correlation with the Beauvais beds. 

 ■^ ^ The Eev. Mr. Wiltshire remai'ked 



jO that in Kent the Ammonites mam- 

 ^Q millaris was contained in large no- 

 §^- dules, and occurred only below the 

 ^ lower phosphatic band. 

 ^* Mr. Whitakee, who had been 



with the author in the Boulonnais, 

 TJ had been, contrary to his predilections, 

 i compelled to regard the beds referred 

 I to the Wealden as belonging to that 

 ^ formation, and not to the Lower 

 ^, Greensand. 



§5 



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4. Note on the Mendip Anticlinal. 

 By C. H. Weston, Esq., E.G.S. 



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