Figure 27. Distribution of rare earth elements normalized to chondrite after {\it Sun} [1982]: (a) Balagan-Tas Volcano; (b) Anyui Volcano; (c) Aluchin volcanoes; (d) Zhokhov Island volcanics; (e) Priokhot'e volcanics; (f) Iceland alkali basalts [{\it Hards et al.,} 1995]; (g) Afar Triangle basalts [{\it Schilling et al.,} 1992].