70 



FOSSIL ESTHERIyE. 



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-coutorta- 

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

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

 more or less distinctly according to the palseontological views of the several observers.^ 



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 ChfF, Westbury. 



Base of tlie Ostrea 

 liasica series. 



Shales. 

 =?^^"'"Ostrea-bed. O. liasica, Modiola minima, Myacites. 



Grey marl. 

 Monotis-bed. 

 Ochreous marl. 



S'* 



ff"{^_ 



Black shale series. I 



...-Grey marl. 



"3- 



'Estheria-hed, 



-Clay. 



^Limestoue (fossiliferous.) 



rThe Estheria-bed consists of indurated 

 nodular clay, sometimes calcareous (the 

 nodules containing i\ielEstheriai). The bed 

 beneath it is a smooth pure clay, lying on a 

 crystalline limestone,^ fidl of shells (Axintis, 

 MyopAoria, Carditim, Myacites, and Pecten 



^ yaloniensis). 



-Grey marl, with conchoidal fracture. 



Jjsj Fish-band. 



Sg -Grey marl, with conchoidal fracture. 



_iJ PuUastra, Cardium, Avieula contorta. 



1^-.— Pecten Yaloniensis. 

 ■^..-.-PuUastra, Cardium, Avieula contorta. 



^.--Pecten Yaloniensis. 



PuUastra, Cardium. 



-Cardium-shales. 



-Avieula contorta, Modiola psilonoti. 



-Bone-bed (pyritous). 



• Pullastra-sandstone. 



-Pullastra-sandstone. 



ih=S:-HSH~D?=~ New Red Marls. 



' 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-Crowcombe, in Somersetshire, described by Mr. C. Moore, 

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



