Alluvium Peat 
60g, or other 
Superficcal covering 
Drift, 
principally Marl 
with Sand 
and Gravel 
Lower Silurian. 
Llandeilo? und 
Bala Beds 
Mica Schist 
(Altered Silurian) 
Granite 
Quartatferous 
Porphyry, 
(elvan) 
Felstone 
