Fig. 4. — Section from Castle Hill to Beili-newadd. 



Beili-newadd 

 N.W. 



[Approximate length = 1^ miles.] 



Fig. 5. — Section from Vaynor Farm to beyond Civm Barn. {Seep. 90.) 



MM Cwm Abbey 



Barn c ^ mh I r 



/ / 



[Approximate length = 1 mile.] 



Fig. G. — Section through Allt-y-bont Hill. (See p. 91.) 



£ Allt>y-bont Hill 



MW. 2 ^ 



[Approximate length = § mile.] 



Fig. 7. — Section from Cwm-bdch to Bwlch Coch. (See p. 92.) 



Bwlch £ 



Coch 



S.£. 



Aa 



[Approximate length — 



C- Ehayader Pale Shales. 

 B= Caban Group. 



JBa 3 = Upper Conglomerate. 

 Ba x = Lower Conglomerate. 

 ^4 = G\vastaden Group. 

 ^4d=:Gigrin Mudstones. 



Ad x = Calcareous-Nodule Beds. 

 Ac =Ddol Shales. 



Ac 3 = Zone of M.fimhriatas. 



Ac 2 = Zone of M. cyphus. 



Ac x = Zone of M. tenuis. 

 Ab=Vyftryn Flags. 



u46 2 =E,ottenstone Beds. 



Ab x = Micaceous Flags and Grits. 

 -4<2 = Cerig Gwynion Grits. 



x= Blue-black Shales. 

 ff= Faults. 



