Calcic amphibo[es from cortlanditic rocks of the Sierra de Gredos were analized with the aim of knowing chemical controls and crystallization conditions. These amphiboles constitute part of the intercumular skeleton. They are rich in alumiina implying mínimum crystal/ization pressures of about 10 for near solidus temperatures. These conditions are diferent from that deduced from the composition of amphiboles in the associated gabbros, suggesting a complex history of crystallization and differentiation at diferent crustal level
