PROCEEDINGS OF THE COTTESWOLD CLUB 249 



Church, and looking straight to the east side of Wainlode 

 Hill on the verge of the River Severn, will have under 

 his eye the outcrop of the whole of the Liassic system, 

 from the Upper Lias, forming the capping of the hill on 

 which he stands, to the lowest beds of the Planorbis 

 Zone. From the Communis Zone Quarry on the hill to 

 the Planorbis beds at Wainlode would be a distance of six 

 miles. 



The principal sub-divisions of the Liassic Rocks are 

 here appended : 



(i) The Midford Sands (passage beds) Between Minchinhampton 



and Bath 

 (ii) ,, Upper Lias - - - On Churchdown Hill 



(iii) ,, Lower Lias - - - Near Churchdown Railway 



Station 



The junction of the last is with the Rhsetic beds, a good 

 walk but a pleasant one, as it ends with the Severn at 

 Wainlode, where one may stand on the sub-formation 

 named the Triassic, or rather the Rha;tic, which reposes 

 upon the Triassic system. 



This outline of the sub-divisions will be naturally 

 followed by a statement of the principal Zones in the 

 Liassic Rocks, named after their characteristic Ammonites. 



The Jurensis Zone 

 I. The Upper Lias, comprising in 

 descending order 



Communis Zone 

 Serpentinus Zone 

 Annulatus Zone 



(The Spinatus Zone 

 ,, Margantatus Zone 

 ,, Capncornus Zone 



The Lower Lias, comprising in 

 descending order 



'The Jamesoni Zone 



, Oxynotus Zone 



, Bucklandi Zone 



, Angulatus Zone 



, Planorbis Zone 



