Figure F16. Downhole variation in anorthite content of plagioclase in Hole 735B gabbros showing the lithostratigraphic units defined by Dick et al. (1991a) and the Leg 118 and 176 Scientific Parties (solid lines) and the mineralogic discontinuities identified in this paper (dashed lines). Lithostratigraphic subunit boundaries are shown with lighter weight lines than unit boundaries.