[ 506 ] 



E. DISTRICT 



(Lower part alone shown) 



Badiolarian chert 



Fig.4. 



Comparative Vertical Sections 

 through the 



Avonian of Gower. 



i nn i i D j - 





! 

 i 



t 

 i 



NtW. district/ i¥rI / 



?L R^iplaruir^chert; 



10 



Modiola-iph.&se 



s 



Si 



Co 



bo O M.odiola--phdLse 



•S f Caninia 



k C < Oolite 



J> ] Laminosa 



J I Dolomites 



N 





Km 



Si / 



O o 



o o 



n 



i . u . i . i 



rrrTT 



ii . i. i j , i j i 



fflffi 



fffflr 



mm 



ol° n°l° 





Feet 



25QQ- 



:T 2400" 



I I I 1 , 1 I M l 



o q o a 



o o o 



O o 



° I 



3 



I -1 ~ 



Hl .l I H 





I Ml I 1 , 1 



O G O 



I J . 1 I I ] 



U4 



ET 



j J I , I, I, I 



FTTmTT 



I I, I l I l, 1 1 



(Sis 



Chiefly 



shales ; 



thickness 



unknown. 



(part only) 



R.c 



®A 



Ifrp, 



8i 



CO 



L.I); 



7 



DEVONIAN 



Old Red ["Where, from any cause, the position of a 



Sandstone) zonal "boundary has not been determined 

 exactly, it is shown as a brokenjine.] 



\ 

 Km\ 



"rf^'T- 



in 



°„»^ g . % 



ir~\ , ..t 



n i i, if i ill 



II I 1,1 I I 11,11 



Li=L 



TTTTT 



lljqjJiLUJJJ, 



I I I II III II 



I Ul I I I III 



Ml HI I H- 





Thickness 

 unknown. 



2300- 



2200' 



2100 



2000 



1900 H 



1800 



17001 



1600 



1500 



1400 



1300 



1200 



1100 



1000 



9001 



800 



700 



600 



500 



400 



300 



200-1 



100 







100 



200-| 



300 



400 



500 



600 



700-| 



800 



900 



1000-1 



1100 



1200 



1300 



14001 



1500 



