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Comparison of oxygen isotope ratios between coexisting olivine and pyroxene from 15 individual chondrules in Murchison. The mean low-Ca and high-Ca pyroxene data are plot against the mean olivine data for δ18O (a), δ17O (b), and Δ17O (c). Relict grains are not included in the calculation of mean values. Propagated uncertainties are estimated in the same procedure as host chondrule calculations (see EA4).
