ZONE OF AMMONITES BUCKLANDI. 



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LiTHOLOGY. Thickness. 

 No. feet. 



Dark shales, 



3.5. Grayish limestone 60 



34. Ten beds of shales and limestone ; 



septaria in the lower beds. 

 33. Thin gray limestone. 



Thick dark clay. 

 32. Thin band of limestone. 



Dark clay. 



3]. Thin band of limestone 50 



Thick dark shales. 

 30 — 25. Six beds of limestone, alter- 

 nating with six thicker beds of 



clay 43 



24. Light-cloured limestone. 



Dark-coloured shale. 

 23. Light-coloured limestone. 

 Dark shale. 



22. Thick White Lias 40 



21—12. Twelve beds of White Lias, 

 separated by thin bands of 



clay 35 



11, 10. Four beds of limestone, be- 

 coming thin and nibbly be- 

 neath, and nodular at the 



base 30 



9. Gotham marble or Landscape-stone 25 

 Black shales. 



8. Band of limestone 20 



7. Nodular limestone. 



Black shales 15 



G. Dark limestone 10 



Dark shale. 



5. Dark limestone 



Dark shale. 

 4. Greenish brown soft marl. 



Marlstone. 

 3. Pale-bluish clay, with plant-like 



fibres 5 



2. Buff-coloured clay. 

 1. Gray sandy marlstone, with ferru- 

 ' ginous spots. 

 New Red Marl. 



Organic Remains. 



Pinna Hartmanni, Ziet., and Unicardium cardioides, 

 . Phil. 



Pecten textorius, Goldf., and Pholadomya ylahra, 

 Ag., Modiola Hillana, Sow., and Avicula 

 (small). 



Fishes' scales ; layers of compressed Pidlastra 



arenicola, Strickl. 

 Pecten Valoniensis, Defr., and Avicula contorta, 



Portl. 



Pullastra arenicola, Strickl. 



