Alto Caapucú (granitos y gneises del sur)
The northwesternmost outcrop of the Río de la Plata Craton: granites, gneisses and migmatites that erosion rounded into blocks.
What it is
The Alto Caapucú (formerly called Southern Precambrian or Pilar Salient) is the northwesternmost outcrop of the Río de la Plata Craton. The rocks include porphyritic granites, orthogneisses, paragneisses, amphibolites, migmatites, talc schists and rhyolite dikes. During the Brasiliano cycle (576 to 480 million years ago) it underwent a major magmatic event.
At the locality of Yaguareté Cuá there are rounded granite blocks of the Caapucú Suite, cores left after deep weathering and later denudation between the Late Mesozoic and the Early Cenozoic. The Cambrian granites of San Bernardino belong to the same suite.
How to visit
It is in the Caapucú area, in southern Paraguarí. It is a geosite of geotourism interest according to inventories; ask the municipality about access.
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Researched and reviewed in September 2026 with 3 sources. A second reviewer checked dates, coordinates and lodging. Hours and prices may change.