  A novel type of self-organized lattice in which chaotic defects are arranged
periodically is reported for a coupled map model of open flow. We find that
temporally chaotic defects are followed by spatial relaxation to an almost
periodic state when suddenly a next defect appears. The distance between
successive defects is found to be generally predetermined and diverging
logarithmically when approaching a certain critical point. The phenomena are
analyzed and shown to be explicable as the results of a boundary crisis for the
spatially extended system.
