Figure F24. Alteration of primary minerals in Subunit 4A. Pl = Plagioclase, Ilm = ilmenite, Ol = olivine. A. Completely altered primary mineral, replaced by clay (Sample 205-1253A-7R-1, 130-133 cm; 414.6 mbsf). B. Olivine completely altered to clay (Sample 205-1253A-8R-1, 24-27 cm; 416.24 mbsf). C. Olivine mostly replaced by clay (Sample 205-1253A-8R-1, 24-27 cm; 416.24 mbsf). D. Altered plagioclase replaced by a mixture of clay and isotropic secondary products (Sample 205-1253A-8R-1, 24-27 cm; 416.24 mbsf).