Figure F6. Variation of compositions of (A) olivine and (B) plagioclase with depth for all of Hole 735B, comprising all of Series 1-3, from the data compilation of Dick et al., Chap. 10, this volume. Minerals from all primitive gabbros are solid red circles; of all differentiated gabbros are solid blue circles. In B, the range of compositions of unaltered plagioclase in felsic veins (Niu et al., Chap. 8, this volume) is compared with the composition of the most sodic magmatic plagioclase found in oxide gabbros (An29).