208 A. R. Andrew—The Dolgelley Gold-belt. 
strike at Hafod-uchaf is 35° east of north, and the dip is in general 
towards the west at an angle of 80°. The lode branches frequently, 
the separated parts usually dying out in a very short distance. This 
Hafod-uchaf lode exhibits in many parts a banded structure due to 
the alternation and admixture of green shale and quartz. The lode 
is sometimes 7 or 8 feet in width, its average width, however, being 
about 8 or 83 feet; the walls are fairly well defined. The prevailing 
minerals in the lode are quartz, chalcopyrite, and pyrites; no gold 
has been taken from this lode. In places the lode is very well 
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Geological Map of the St. David’s section of the Dolgelley Gold-belt. 
mineralized, but the average tenor of the ore is so much impoverished 
by long stretches of barren quartz that the lode has not paid working 
expenses. This lode cuts through the Gamlan Shales, and is intimately 
associated with an intrusion of greenstone which it intersects at 
several places. 
Hendre-forion Lode.—Half a mile to the east of the Hafod-uchaf 
lode, i.e. a little to the north of the Hendre-forion Farm in the 
Hirgwm Valley, there is another parallel lode striking 30° east of 
nor th, which can be traced for half a mile; the dip is slightly towards 
