Bjerg, Ernesto Alfredo The upper mantle beneath Patagonia, Argentina, documented by xenoliths from alkali basalts - Oxford Elsevier Science January 2005 - pp. 125-145 ilus., tbls. ISSN: 0895-9811 Subjects--Topical Terms: BASALTOSCOMPOSICION ALCALINAGRANATEMAGMAMANTO SUPERIORMETASOMATISMOXENOLITOS Subjects--Geographic Terms: ARGENTINAPATAGONIA