Abstract
Results of analyses on composite samples of igneous and sedimentary rocks and chondritic meteorites, obtained by an improved analytical procedure, are reported. The relative rare-earth abundances in composite samples of shales, metamorphosed shales, basalts, rhyolites, and granites are remarkably similar to each other, but small differences are apparent, even among the heavier rare earths. Eu and Ce show “anomalous” abundances in several of the samples. A new value for the average Gd content of chondritic meteorites leads to the conclusion that common crustal rocks are deficient in Eu, relative to the other rare earths.
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