Figure F39. Zr vs. Y for Leg 185 least-altered basalts (solid [blue] circles, Figs. F37, F38). Solid (green) circles are shipboard XRF analyses from Leg 185, open (blue) circles are data from the modern East Pacific Rise (EPR) (8°-15°N) (Langmuir, 1987), open diamonds are data from the modern Mid-Atlantic Ridge (MAR) (between the Kane and Hayes fracture zones) (Langmuir et al., 1986). Black line corresponds to Zr/Y = 3.