The area contains a 'geological unconformity' where rock layers from the Paleozoic era are directly overlaid by layers millions of years younger, representing a massive gap in the geological record.
Fossil remains of ancient crocodiles and armored reptiles have been excavated within the reserve boundaries.
The site acts as a transitional zone between the Andean mountain range and the Mendoza plains.
Water from the reserve eventually feeds into the irrigation systems of the greater Mendoza metropolitan area.
Divisadero Largo is a 492-hectare provincial nature reserve located in the foothills of the Andes, known for its significant geological diversity spanning 200 million years. The terrain features sedimentary rock formations that reveal fossils from the Triassic, Jurassic, and Tertiary periods. Hikers traverse a landscape characterized by arid shrubland, desert flora, and distinct drainage basins. The preserve serves as an open-air laboratory for geology and paleontology studies due to the visible unconformity between different rock strata. Visitors can observe local wildlife, including rheas, foxes, and various birds of prey, in their natural habitat. The reserve is managed by the Mendoza government to preserve its unique paleontological heritage.
The viewpoint overlooking the 'Divisadero' ravine, which provides a panoramic perspective of the distinct, multi-colored geological strata.
Bring significantly more water than you expect to drink, as the desert climate causes rapid dehydration.
Wear high-quality trekking shoes with ankle support due to the loose, rocky, and uneven terrain.
Carry sun protection, including a hat and high-SPF sunscreen, as shade is extremely limited along the trails.
Do not attempt the hike during the midday heat in summer, as there is almost zero natural shade on the exposed rock paths.
Closed on Mondays for maintenance and research operations.
Stay strictly on marked trails to protect fragile fossils and avoid disturbing local wildlife; pack out all trash.
