FIGURE 9. Reconstructed phycosiphoniform burrow with associated halo from Rosario Formation, Baja California, Mexico. Coarser grained material of the halo propagates downward from the line of each lobe arm (in direction to bedding plane) and fills the space between the lobe arms. 9.1-9.3. Different views of reconstructed burrow with surrounding halo in relation to the bedding plane. 9.4. A Quicktime format video file of rendered reconstruction of burrow with the associated halo.