Figure F4. Modal variation in gabbros from Hole 1105A based on point counting of thin sections. A. Plagioclase-pyroxene-olivine (Pl-Px-Ol) relations. B. Plagioclase-pyroxene-Fe-Ti oxide mineral (Pl-Px-Ox) relations. Symbols are given for main petrographic groups of gabbros as discussed in text. Data are from Shipboard Scientific Party (1999).