The earthworks of a possible post medieval sea bank can be seen on aerial photographs taken in 1946. This earthwork is situated on Nor Marsh. It encloses a small area of the north west of Nor Marsh which measures approximately 380m by 300m. This may represent a sub-division of the marsh or an earlier phase of reclamation. It appears to survive as a slight earthwork but is in places better defined by the water channels than run along either side of it. This feature was mapped from aerial photographs as part of the English Heritage: Hoo Peninsula Landscape Project.(1-2)