458 The Carboniferous Succession below the Coal- Measures. 



2. The beds east of Bwlch-y-g\vynt, at the foot of the hill near 

 Llanfenes, and near Llanarmon. Characteristic fossils : Cyatho- 

 phyllum Murcliisoni, Chonetes papilionacea, Productus Cora, P. hemi- 

 sphericus. 



3. Intermediate strata, whose position relative to one another 

 cannot as yet be definitely assigned, appear at the surface at Meliden, 

 Gwaenysgor, Axton Mine, Garreg, and Cat Hole, east of the Logger- 

 beads Inn. Characteristic fossils : Productus Cora (few), P. hemi- 

 spliericus {coxamot).), P. gig aniens (not rare). The quarry at Holy well 

 Common, above the Grange Farm, is probably at the upper limit of 

 this horizon (see Fig. 1, p. 394). 



4. The next stage is exposed at Hendre, Gwernymynydd. north 

 of Gwyndy, Pot Holes (the last-named quarry can be definitely 

 correlated with the "No. 1 Encrinital Limestone" at Gwernymynydd; 

 see p. 398), Minera, Ty-nant ravine, Corwen, and Treflach Wood 



^ti 



is io 



'^ §. 



.'^^ 



5^ 







asSs(^^if=;ocoic 



(s. .y -» ^ t '^ 

 . -^1 1 tl g' 



BAOEWENT BEOS. 



LOCAXITIES. 



Gronant. 



Gorsecld, Holloway, 

 Waenbrodlas. 



/"Gwernymynydd, Gwyndy, 

 I Pot Holes, Hendre, Trefone; 



Treiiach, Llangollen, 

 \E. ot Llarnarmou, Corwen. 

 /-Garreg, Gwaenysgor, 



Holywell Common, 



Meliden, Axton, 



E. of Loggerheads, 

 '-E. of Llanarmon. 



Llangollen. 



Llauymyuech. 



Porth y waen. 



S. of Llysvaen. 

 Llanferres, Minera. 

 Eglwj-seg ridge. 



Llandulas, Minera, etc. 

 S. of Dv.sertli. 



Fig. 3. — Diagram showing the stratigraphical distribution of the most important fossils. 



