70 



FOSSIL ESTHERLE. 



this section is lit up by the sun's rays, and seen at a distance of two miles, it has 

 a most beautifully picturesque appearance from the varied colouring of its different beds." 



The strata of this section, from No. 2 to No. 16, inclusive, belong to the "Avicula-contorta- 

 series" of Oppel, Wright, and other palaeontologists, or to the " Rhsetic formation" of 

 Giliiibel, C. Moore, and others, and are separated from the Lias above and the Trias below 

 more or less distinctly according to the palaeontological views of the several observers. 1 



To R. Etheridge, Esq., F.G.S., of the Geological Survey, I am indebted for the accom- 

 panying, still more accurately measured, section and diagram of the interesting strata of 

 Garden Cliff, VVestbury. 



Base of the Ostrea ...US 

 Hasten series. 



6" 



-Shales. 

 ""Ostrea-bed. O. Hasten, Modiola minima, Myacites. 



"Grey marl. 

 — -Monotis-bed. 



— Cebreous marl. 



3' 



6" '[■ 



Black shale series. 



2' | 



S" £■•:• 



Grey marl. 



.•Estberia-bed. 



"Clay. 



"^Limestone (fossiliferotis.) 



The Estberia-bed consists of indurated 

 nodular clay, sometimes calcareous (the 

 nodules containing the Estherics). The bed 

 beneath it is a smooth pure clay, lying on a 

 crystalline limestone, 2 full of shells (Axinus, 

 Myoplwria, Cardium, Myacites, and Pecten 

 Valoniensis). 



-Grey marl, with eoncboidal fracture. 



• Fish-band. 

 Grey marl, with eoncboidal fracture. 



■ Pullastra, Cardium, Avicula contorta. 

 ■Pecten Valoniensis. 



■ Pullastra, Cardium, Avicula eontorta. 



Pecten Valoniensis. 

 Pullastra, Cardium. 



■ Cardium-shales. 



-Avicula contorta, Modiola psilonoti. 

 Bone-bed (pyritous). 



Pullastra-sandstone. 

 Pullastra-sandstone. 



|JSSH^H=:-H~sii: New Red Marls. 



1 See Mr. C. Moore's memoir on this formation in the 'Quart. Journ. Geol. Soc.,' vol. xvii, p. 483. 



2 The same as the fossiliferous bed at Beer-Crowcombc, in Somersetshire, described by Mr. C. Moore, 

 ' Quart. Journ. Geol. Soc.,' vol. xvii, p. 486. 



