Fellow peat lovers,
here are two images that may interest you. The first one is a shot of patterns of peat extraction in an archaeological excavation. Interesting shapes!
The second photo shows Medieval peat extraction on a Roman Period site. Most of the peat was excavated in the Middle Ages, except where it contained too much wood. In this case the peat contains in situ oak posts that are part of a Roman building. The remnants of peat show the plan of the building; large timbers through the center of the building with much lighter posts being used for the outside walls.