Caapucú High (formerly called Precámbrico Sur and Saliente del Pilar) is the Northwesternmost outcrop of Río de la Plata Craton.[1] The rocks found in the Caapucú High include porphyritic granitic rocks, orthogneisses, paragneisses, amphibolites, migmatites, talc schists and rhyolite dykes.[1] During the Brasiliano Cycle (576-480 Ma ago) the area of the Caapucú height suffered a major magmatic event.