﻿ZONES I g I Cleistopora 

 ^subzone^ I \nassus\ octopucata 



H 



Zaphrentis SyringotHy ris 





hesfa z 



p ?z59 g 



S B 



••?!!-** «" 







r'--N -%r -----o»---~5fe-- 



Dibunophyllum 

 90 



Hi 





^L^LJL^i^JL 



Ju^ 



I i f g 



THE ZONES IN THE AVON GORGE. 



Horizontal Section. (.Natural Scale.) 



SKETCH-MAP OF QUARRIES, &c. 



Zonks akb Sobzones. 



111 = {Modiola- Phase). 

 K = Cte/ Sroposj . Zone f K, = Subzone of Pndwtu, basms. 

 1 K 3 = Subzone of Spiriferina octoplicata, 

 Z = Z4«w Wm _ Zone f Z, = Subzone of Spirifi r aff. i fotiWuj. 

 n _ , '"1 Z a = Subzone of Schizophoria raupinatu 

 ' ™ XG "T"vl;ls-7.„ n ,. | including fc.»;„.. s , ( -sul)/ono (C ) ni.l Horizon J) 



VISEAN „ „ . „ „ , , „ , ' 



, o = *»&/KULA-ZnnB I S, = Subzone o) Productus se ,„,,; ,,,-„l„t„+, „,, ii , 



or \ S a = Subzone of Productus aff. C,„;, imut. S ). 



Upper C iH ao.v,FE R ous Lisiestoxe. [ D = i> mxoPBY , , ,.„ _ f D, = Subzone of DUnmophyU B and Dibunophyllum . 



' ' ' ' \ D, = Subzone of Ltmsdrdia Jloriformis. 



Top ofl[. Imllomof 



(that is, faunal overlaps of i 



ol Carboniferous Limestone, bottom of ' Millstone-Grit ' iu the Bristol i 

 [The CAXIXIA-Zane includes Horizon 7, Zone C. and Subzone S,.] 



