Heumann, Arnd U-Th Disequilibrium and Rb-Sr Age Constraints on the Magmatic Evolution of Peralkaline Rhyolites from Kenya - Oxford Oxford University Press March 2002 - pp. 557-577 ilus., tbls. ISSN: 0022-3530 Subjects--Topical Terms: CAMARA MAGMATICACRISTALIZACION FRACCIONADADATACION RB-SRDATACION U-THGEOCRONOLOGIAMAGMATISMORIOLITA Subjects--Geographic Terms: KENYA