Figure AF5. Variation of compositions of (A) olivine and (B) plagioclase with depth between 200 and 300 mbsf, highlighting intervals in lithologic Unit IV. Solid red circles = minerals from all primitive gabbros, solid blue circles = all differentiated gabbros. The narrow arrows show general trends of increasing extent of differentiation with depth.

Figure AF5. Variation of compositions of (A) olivine and (B) plagioclase with depth between 200 and 300 mbsf, highlighting intervals in lithologic Unit IV. Solid red circles = minerals from all primitive gabbros, solid blue circles = all differentiated gabbros. The narrow arrows show general trends of increasing extent of differentiation with depth.