Figure F12. Photomicrograph in plane-polarized light of Sample 187-1160B-6R-1, 106-110 cm (see "Site 1160 Thin Sections"), showing smectite and Fe oxyhydroxide replacing groundmass clinopyroxene. Note the Fe staining of the plagioclase phenocryst along a microcrack (alteration Facies I, Unit 3). Also note that bubbles are defects in the section.