Entire coal seams are removed from the top of a mountain, hill or ridge by removing the overburden above them, and restacking the overburden back on the ridge to reflect the approximate original contour of the mountain.
Entire coal seams are removed from the top of a mountain, hill or ridge by. Entire coal seams were removing the overburden above them. Entire coal seams were restacking the overburden back on the ridge. This was to reflect the approximate original contour of the mountain.