Figure F5. Photomicrograph, with crossed polars, of Sample 187-1162A-5R-1 (Piece 7, 25-28 cm; see "Site 1162 Thin Sections"), showing an olivine phenocryst in metadiabase that is totally replaced by concentric rings of highly birefringent talc and opaque minerals, with cummingtonite? (C, center). Actinolite (A, lower right) has replaced matrix clinopyroxene.