202 



PROCEEDIlfGS OP THE aEOLOGICAL SOCIETY. [Mar. 20, 



Vertical Section of the Lias Conglomerate, Sfc, as exposed on the 

 Glamorganshire Coast. Scale \ incli to 1 foot. 



-* Gryphcsa incurva. 

 t Ammonites. 

 I Ostrea Liassica. 

 § Lima gigantea. 





Irregular blue-grey limestone, with shale above and below. 



Hard blue-grey limestone, with small, generally angular, 

 fragments of black chert. Under-surfaces of the beds 

 covered with Fueoids. 9 ft. 9 in. to 10 ft. 2 in. 



Large lumps of chert. Very even-jointed bed. 15 in. to 

 2 ft. 



"* Chert 



"■* )► Hard blue smooth-jointed limestone with shale. 4ft. lOin. 



- 1 Hard limestone, 3 in, to 14 in. Shale above and below. 

 2 ft. 2 in. A 



Uft. 6in. to2ft. 



. ft. 8 in. 



Large Ammonite, 

 Plant, and Galena. 



ft. 10 in. 



Hard grey limestone, with smooth 

 joints, weathering rounded. 



. ) Univalves. Shaly bed, with black chert, passing 

 S into limestone m 

 Chert. 



i|„ "'iflllKr^ "'Hjifr ■'■Tfi|D.ji^-;i||ij| f into limestone below,' 1 ft. 5 in. to 2 ft. 3 in. 



Hard grey limestone, 2 ft. 3 in. to 2 ft. 11 in. Galena. 

 Carboniferous Limestone. 



