﻿Fig. 3. 



Vertical section of the Middle and Upper Lias at Down 

 Cliffs and Thomcombe Beacon ; adapted, tuith additions, from 

 E. C. H. Day, Quart. Journ. Geol. Soc. vol xix (1868) p. %85. 



15 feet, a C^»^- 



140 feet, b 



70 feet, c 



18 feet, c* 

 8 feet, d 



€0 feet. 



1. foot. 



83 feet, h 



Drift. 



4-6 feet, i- 



90 feet. I 



6= Upper Lias Sands. 

 [Moorei-Dumortierice.\ 



c— Upper Lias Clay. 

 [Dumortieri<B.~] 



w 1 Upper Lias Stone and the Marlstone [Junction Bed : 

 -» striatuli, lilli, bifrontls,faleiferi, ucuti (0, spinati.'] 



> e*=Clay, the same as <?. 



[spinati?] 

 d— Blocks of indurated sand. 



e=Light brown sands. 

 /==Blue marl. 

 g^MargaritatusBed. 



' A = Marly sands. 



i=The Starfish Bed: 



Ophioderma egertoni. 

 fr=The Shell Bed. 



Z=Grey micaceous marls. 



2=Band of hard marl. 



3=Layer of small nodules 

 [with Amaltheus cleve- 

 landicus, Young & Bird]. 



[d, e : Mhynchonella- 

 northampto nensit 

 Bed somewhere in 

 this series.] 



[«*-/*: spinati hemera, 



cf. E. C. H. Day, p. 288.] 



[g-k: perhaps all of 

 margaritati hemera 

 (Upper Margaritatus 

 Beds).] 



Algociani hemera (Lower 

 Margaritatus Bed). It 

 would be from this place 

 <Thorncombe Beacon), 

 and probably from this 

 bed, that the type of 

 Amaltheus Stokesi (J. 

 Sowerby) was obtained. 

 His locality is Bridport.] 



[Additions are enclosed in square brackets.] 



