38 



THE LIAS AMMONITES. 







s 



^ 



No. 



LlTHOLOGY. 



Thick- 

 ness. 



Organic Remains. 



r 



8 

 7 



6 



4 



3 



2 



Black shales. 



Band of limestone 



feet. 

 20 

 15 

 10 



5 



Fishes' scales ; layers of compressed Pul- 



lastra arenicola, Strickl. 

 Pecten Valoniensis, Defr., and Avicula con- 



torta, Portl. 



Pullastra arenicola, Strickl. 



Nodular limestone. 



Black shales 



Dark limestone 



Dark shale. 



Dark limestone 



Dark shale. 



Greenish-brown soft marl. 



Marlstone. 



Pale-bluish clay, with plant-like fibres... 



Buff-coloured clay. 



Grey sandy marlstone, with ferruginous 



spots. 

 New Red Marl. 



Lyme Regis. — The Bucklandi-zone is admirably shown in the coast-section at Lyme 

 Regis, Dorset, both in the Church Cliffs and at Pinhay Bay, where the beds consist of 

 a series of grey limestones, from 2 to 10 inches in thickness, varying from earthy to 

 compact, and alternating with marls and shaly beds — either in seams of a few inches, or 

 in beds of many feet in thickness. The following section, from the lowest stratum on the 

 shore to Broad Ledge, which may be considered the uppermost bed of the Bucklandi 

 series, affords a correct view of the stratigraphical order of these strata at Lyme and of 

 the fossils they contain. The profile must be read in a descending order through the 

 Turneri and Bucklandi beds towards the Anguiatum-zone on the shore. 



Section of the Bucklandi-beds/nw* Broad Ledge to the shore at Lyme Regis. 



No. 



LlTHOLOGY. 



Dark-grey limestone. " Broad Ledge " 

 or " Table-bed " 



Dark marls and shales, with bands of 

 clays 



Grey limestone 



Dark slaty marls with indurated bands of 

 imperfect limestone 



Thick- 

 ness. 



ft. 



in. 



3 



6 



IS 











4 



3 







Organic Remains. 



Ichthyosaurus communis, Conyb., /. platy- 

 odon, Conyb., Arietites semicostatus, Y. 

 & B., and Rhynchonella variabilis, Schloth. 



Arietites Turneri, Sow., and Fishes. 



Arietites Turneri, Sow., and Ar. semicostatus, 



Y. &B. 

 Lima gigantea, Sow., L. antiquata, Sow. 



