what are/were they mining? I recall some grusome scenes of mines in south america...tin mines, perhaps...in one of the movies Koyanaquatsi
or powasquatsi...there were 3 movies in that series....with music by phillip glass. they were in the style of montage...almost like slide shows with image after image.....the mines in the movie were open pit maines with workers crawling up out of a pit with bags of ore on their heads and backs...oh see it is a copper mine.