Resumen
ABSTRACT. A preliminary paleomagnetic study of rocks from the Hoyada Verde Formation, exposed in Sierra de Barreal, Western Precordillera (31.7°S; 69.5°W), has shown that these rocks are carriers of a secondary remanent magnetization, acquired during the folding of this formation. The position of the computad paleomagnetic pole (356.2°E-41.9°S, D1=8.3°,D2=6.0°) is concordant with the Late Carboniferous paleomagnetic poles of stable areas of South America and indicates that the age of the folding is Late Carboniferous. The position concordant with the cratonic poles al so suggests that the Hoyada Verde crustal block was not affected by the tectonic rotations, determined by previous paleomagnetic studies, that took place during !he Permian in this region of the Gondwanic continental margin