This site is more unusual than the majority of “primitive mines” investigated so
far within the Plynlimon area in that the ore body here is dominated by iron pyrite,
although copper and lead/zinc ores are also present; indeed the latter have been
recorded from the vein.
Lewis Morris refers to stone hammers from this site in his description of Twll y
mwyn in 1742, and it was this that led us to investigate what otherwise appeared
to be a rather unlikely choice of mine.
Fragments of these tools as well as charcoal were recovered from an ancient spoil
mound exposed within the side of a track during the course of investigations carried
out in 1996. The ancient spoil here was associated with a large “pit” which had been
holed through and drained during 19thC mining operations (Timberlake 1996).
A C14 date of between 2135 -1885 yrs cal BC was obtained from charcoal recovered
from this section. This is a credible date, but surprisingly early for mining within
this part of Wales.