Виктор Пинчук · CC BY-SA 4.0Cerro Hũ (arenisca ordovícica)
The typical section of the Cerro Hũ Formation: sands from an ancient river, coarse at the base and finer at the top.
What it is
Cerro Hũ (“black hill” in Guaraní) is the type outcrop of the Cerro Hũ Formation, part of the Caacupé Group, of Late Ordovician age. At the base it has coarse to conglomeratic sandstones that give way to medium sandstones toward the top: the sign of a river current that lost energy over time.
Together with the Paraguarí Conglomerate, the most basal unit of the same group, it tells what the region’s rivers were like more than 440 million years ago.
How to visit
It is in the Paraguarí district. It is a rural, scenic hill; ask the municipality about roads and access before you go.
Related place
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Paraguarí
A town of hills and trains where Belgrano was stopped in 1811: lookouts, railway museums and rail bikes.
Nearby
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Cerro Hũ (Cerro Negro)
One of the hills ringing Paraguarí, with a trail to the summit and a viewpoint, also called Cerro Negro.
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Paraguarí
A town of hills and trains where Belgrano was stopped in 1811: lookouts, railway museums and rail bikes.
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Cerro Mbatoví
A ridge of the Cordillera de los Altos, a Municipal Interest Natural Reserve since 2007.
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Campo de batalla de Paraguarí (Cerro Mba'e)
The setting of the 19 January 1811 clash that stopped Belgrano, a milestone of independence.
Researched and reviewed in September 2026 with 2 sources. A second reviewer checked dates, coordinates and lodging. Hours and prices may change.