ZONE OF AMMONITES BUCKLANDI. 



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LiTHOLOGY. Thickness. 



No. feet. 



Dark shales. 



35. 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. 



31. Thin band of limestone 50 



Thick dark shales. 

 30 — 25. Si.v 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 rubbly 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 



6. Dark limestone 10 



Organic Remains. 



Dark shale. 



5 . Dark limestone 



Dark shale. 

 4. Greenish brown soft marl. 



Marlstone. 

 3. Pale-bluish clay, with plant-like 



fibres 



2. Buff-coloured clay. 

 1. Gray sandy marlstone, with ferru- 

 ginous spots. 

 New Red Marl. 



Pinna Hartmanni, Ziet., and Unicardium cardioides, 

 Phil. 



Pecten textorius, Goldf., and Pholadomya glabra, 

 Ag., Modiola Hillana, Sow., and Avicula 

 (small). 



Fishes' scales ; layers of compressed Pnllastra 



arenicola, Strickl. 

 Pecten Valoniensis, Defr., and Avicula contorta, 



Portl. 



Pullastra arenicola, Strickl. 



