We're just beginning a study of the mining remains (among other things) on
the Territorial Army firing ranges at Yoxter, near Cheddar, where there are
some incredibly well-preserved landscapes. At one point among the rakes and
gruffs of what we assume is early post-medieval lead mining, we have come
across a series of earthworks that have even the 'experienced in mining
earthworks' scratching our heads.
They consist of a series of very straight low ridges (about ten at the
lower end, although some of them die out before reaching the top end),
about 0.5 wide and 1m wide, some with stone cores, that run parallel for
about 60m down a gentle slope. There does not appear to be any walling in
them, and they are not anything obvious like condensing flues. There's no
direct stratigraphical relationship on the ground with the spoil from the
mining, so they might not even relate to it. Ideas, anyone? I can't post
any photos 'cos they're obscured by bracken, but we will probably clear
them off at some stage to record them.