Figure F44. Photomicrograph of Unit 6 euhedral olivine with unaltered interior and rims altered to iddingsite and green clay (Sample 197-1206A-18R-1, 49-51 cm [Piece 4]). A. Plane-polarized light; field of view = 0.625 mm; photomicrograph 1206A-358. B. Cross-polarized light; field of view = 0.625 mm; photomicrograph 1206A-359.