380 



PROCEEDINGS OE THE GEOLOGICAL SOCIETS". [Feb. 29, 



ft. in. 



Black laminated clay 8 



Hard, greyish, pyritic limestone 2 



Black laminated clay 1 



Greyish sandstone 2 



Black laminated clay 1 6 



Bone-bed 1 



Black laminated clay 3 6 



Greenish, angular, Keuper 

 marls 25 



Apparently unfossiliferous. 



With bivalve shells, undetermined. 



Unfossiliferous. 



With Pullastra arenicola. 



Unfossiliferous. 



With teeth of Scmrichthys, Acrodus, 



and Hybodus; scales of Gyrole-pis; 



Saurian bones ; and Coprolites. 



Bushley. — Another intersection of the low escarpment, formed by 

 the junction of the Lias with the Bed Marl, on the Ledbury Eoad 

 near Bushley, exposed a similar section to the preceding. The 

 Pecten Valoniensis bed was underlain by 9 feet of black shale, which 

 rested on a light-coloured micaceous sandstone containing Pullastra 

 arenicola and Avicula contorta. 



It is evident from these details that the Avicula contorta beds in 

 Gloucestershire and Warwickshire are very similar in their strati- 

 graphical character. 



Aust Cliff. — If we proceed from Garden Cliff down the Severn, the 

 next section of the Avicula contorta beds is met with at Aust Cliff, 

 so long famous for its Bone-bed and the large number of Ceratodus 

 teeth which from time to time have been collected therefrom. My 

 friend Mr. William Sanders, of Bristol, measured this section some 

 years ago, and the results of his observations were published by Sir 

 Henry De la Beche in his valuable memoir on the Geology of the 

 South-west of England*. Buckland and Conybearef had previously 

 published a section of Aust Cliff in their memoir on the South- 

 western Coal-district of England. 



In the upper part of the section we find about 2 feet 6 inches of a 

 grey argillaceous limestone, containing Ammonites angulatus, Schlth., 

 Lima gigantea, Sow., Lima antiquata, Sow., and Modiola Hillana, 

 Sow., representing the bottom-beds of the Lima series. BeloAV these 

 are nine beds,, consisting of grey marls and argillaceous limestones, 

 representing the zone of Ammonites planorbis ; the lowest lime- 

 stone-bed of that set contains scales of Eishes, elytra of Insects, with 

 Modiola and Terebratula. 



This rests upon 



ft. in. 



/Black shales G 



Grey argillaceous limestone 8 With Fishes' scales, abundant. 



Black laminated shale 3 



Calcareo-arenaceous bed ... 



Zone of 

 Avicula 

 contorta. 







Black laminated shale 



Bone-becl 1 in. to 



Fern (" Pale arenaceous marls ... 1 



K < Greenish marls 2 



- ' [ Variegated red marls 120 



With Saurian bones and Fishes' 



scales. 



With Fishes' teeth, Saurian bones, 

 and Coprolites. 



* Memoirs of the Geological Survey of Great Britain, vol. i. p. 253. 

 t Geol. Trans. 2nd series, vol. i. pi. 37. 



