Fig. 3: Cross section plotted on east-west plane showing heights of the six beach ridges at Turakirae Head. Heights are given in metres above approximate M.H.W.M. The vertical lines are the north-south grid lines, the numbered lines being 1,000 yards apart. The mouth of the Orongorongo River is at 453, Turakirae Head at 468, and the axis of the Rimutaka Range at about 495. Beach ridges defined by closely spaced levels are shown by solid lines, those less well defined by dashed lines. The dots are average values for the best defined parts of the ridges and the dotted lines give the best indication of uplift and tilting. By extending the dotted lines it will be seen that ridges B, C, D and E intersect near grid line 400, whereas ridges A and B intersect much further to the west.