a) Crop of NAC image showing linear features in Anubis similar to Imhotep region. The Anubis region displays a considerable number of boulders, which may have originated from the Atum region. Note the smooth surface texture in comparison with the rough-textured enclosing regions of Atum and Seth. For context, refer to Fig. A.5a. b) Crop of NAC image showing possible folding in the Anubis deposits close to the boundary with Seth. c) Crop of NAC image showing the ridge separating Seth and Anubis.