PT - JOURNAL ARTICLE AU - Donald C. Noble AU - Joseph Haffty AU - Carl E. Hedge TI - Strontium and magnesium contents of some natural peralkaline silicic glasses and their petrogenetic significance AID - 10.2475/ajs.267.5.598 DP - 1969 May 01 TA - American Journal of Science PG - 598--608 VI - 267 IP - 5 4099 - http://www.ajsonline.org/content/267/5/598.short 4100 - http://www.ajsonline.org/content/267/5/598.full SO - Am J Sci1969 May 01; 267 AB - Comendite-pantellerite series, depletion of Sr and Mg, increase in Ca relative to Sr, evidence for extreme fractional crystallization