Figure F3. Photomicrograph in plane-polarized light of Sample 187-1164A-4R-1, 20-22 cm (see "Site 1164 Thin Sections"), showing euhedral clinopyroxene microphenocryst in plumose groundmass quench texture typical of Unit 1 of Hole 1164A. Note the quench growth that apparently nucleated on the edges of the tabular plagioclase crystal (lower right).