NEIGHBOURHOOD OP SAKN, CAERNARVONSHIRE. 443 



Fig. 1. — SJcetch-map of the Sam district. (Scale | inch=:l mile.) 



Granite. 



Grabbro and Diorite. 



Diabases. 



Probable faults marked 



Hornblende-diabase. 

 Hornblende-picrite. 



Dips. 



Ca. Cefn-amlwch. 

 B. Bryn-croes. 

 Lf. Llanfaelrhys. 



Lg. Llangwnadl. 

 M. Meillionydd. 

 P. Peuarfynydd. 



S. Sarn. 

 R. Ehiw. 

 Cf. Craig-y-fael. 



