Seager, W. R New K-Ar dates from basalts and the evolution of the southern Rio Grande rift bibliogr. p. 98-99 ISSN: 00167606 Subjects--Topical Terms: GéochronologieK-ArBasalteEvolutionTertiaireQuaternaireTectoniqueGéomorphologieRift Subjects--Index Terms: Etats Unis New Mexico