220 



J3E. ^VILLS AXD ME. SilllH OX THE LO^VEE [vol. Ixxviii, 



Speaking generallTj the apparent aggregate throw of the fault- 

 plexus is down to the north-west. Thus it truncates the Coi-^ven 

 Buttress, bringing Silurian and Carboniferous agamst the Ordo- 

 vician ; it cuts across the Llano-ollen Svnclinorium so that leint- 

 wardinensis beds which only crop out in the heart of the basin 



Fisf. 



o. 



SSO Yards 



l/o Miles 



300 Feet^ above O' .P."- 



Quarry 



Graig 



Seccion along- the line A. B.C. 



near Llangollen, reappear in the BryneglwYs area. Again, it 

 shears across the western and northern sides of the Cyrn-y-Brain 

 Dome, in such wise that Yalentian and Carboniferous rocks lie 

 against the Ordovician. In the Carboniferous it produces a great 

 displacement westwards on its northern side. 



