1863.] 



BAY LIAS OF DORSETSHIRE. 



285 



Fig. 4. — Vertical Section of the Middle and Upper Lias at Dmvn 



Cliffs. 



33 < 



O ■•*=._ .:X;:C : " 





feet. 



a. Drift (Thorncombe Beacon) .... 15 



b. Upper Lias sands 140 



c. Upper Lias clay 70 



e*. Clay (same as c) 18 



d. Blocks of indurated sand 8 



e. Light-brown sands 60 



/. Blue marl C>£ 



g. Margaritatus-bed 1 



h. Marly sands, with many tiers of sandy 

 nodules in the upper part, and beds of 

 irregular and laminated sandstones 

 in the lower 83 



i. The Starfish-bed 4 to 6 



Jc. The Shell- bed. 



1. Grey micaceous marls (Toad's Cove) . 90 



1. Upper Lias stone and the Marlstone. 



2. Band of hard marl. 



3. Layer of small nodules. 



