Abstract: This study investigates three-dimensional geometry of en echelon folds. To elicit the geometry,twenty-four fold azimuths were examined on twelve separate anticlines in the Los Angeles and Ventura areas. Field datashow that hinge azimuths of en echelon folds deviate to new orientation and acquire smaller angles to the sheardirection. The change in orientation of the fold azimuths is interpreted as the consequence of difference in duration ofdeformation and physical parameters between the levels studied.