122 Dr. R. L. Sherlock — BatuTn-lines in English Keuper. 



Rhsetic. Hence we may conclude that in this district the Rhaetic is 

 strictly conformable to the Keuper. 



Away from the ISTewark-Orston district we cannot trace the 

 individual heds of gypsum. We do find, however, that a belt of 

 strata containing heds of gypsum occurs at approximately a constant 

 distance below the Rhaetic beds at numerous places between Middles- 

 brough and Somerset. The gypsiferous belt is of varying thickness, 

 being better developed in some places than in others, and we cannot 



NEWARK 



hannton 



BOWBRIDGE 



Alluvtum 



■ ?:^a^' 



AlluiHurn 



f^arl with 



GypsuM 



Grey 



roc/i 



'Bastard 



Marlwth, 'Three 

 nodxdes of foot' 



GyPSUM 'r- 



Four 

 'folders ' 



StueTock- 



^m^. 



cep^d^fp, 



Mi'xed 



Green 

 Marl 



Ibjihed 



stone 



Greet! Mar! 



MarlM 

 fevtcaks 

 ofQypsvn 



erey- 



rock 



Bastard 



Mari wUk 

 GyPSuM 

 'cakes 



Riders ' 







2^^ 



^:<3st?H>r' 



ORSTON 



Soil 



Balls of 

 GyPSuM 

 •<n.t^arl. 



'Coarse 

 QyPSUM 

 Marlviith 

 Sails of 

 QyFSUM 



■Alarlwth 



Balk of 



.RedG.yPSUi<, 



^arlvtlth 



BcdkdGym 



Balls of Cyf^O/^ 

 ffidiiklnfh'ite'rbcK 



-BottmrfStlvteroU 



Marl With 

 GypsuM 

 ' U^Q^ Blue rock 

 t^arl 





^MSi 



s;:^^ 



^^^^^ g 



Sections in the Newark District of Nottinghamshire. 

 Scale : 1 inch represents 18 feet. 



pick out a particular seam as a datum-line over a large area. But 

 the belt as a whole may be so treated, if its approximate middle be 

 taken. North of Newark the belt becomes more poorly developed," 

 hut it has been worked in the past at Laugh terton, near Gainsborough ; 

 at Winton, Stank Grange, Hallikeld, and Little Sessay, near 

 Northallerton; and at Eston, near Middlesbrough. Proceeding in 

 the opposite direction, it is worked at Cropwell Bishop, Notts. In 



