Agua de la Piedra Formation, Geological formation in Mendoza Province, Argentina.
The Agua de la Piedra Formation is a geological unit in southern Mendoza Province composed of sedimentary rocks, volcanic ash layers, and conglomerates arranged in visible strata. These rock layers reveal the environmental conditions that existed during their formation millions of years ago.
This formation developed during the Late Oligocene epoch when volcanic activity and shifting climate patterns shaped the rock deposits. The geological unit received its formal scientific description in 1979 when Gorroño defined its characteristics.
Scientists and researchers from Argentina conduct regular geological surveys at the site to document the evolution of South American landscapes and ecosystems.
Access to this geological unit is available through several points near towns scattered across the region. Visit during the southern hemisphere summer between December and February for the most comfortable conditions.
Remains of extinct mammals and terror bird species were found at Quebrada Fiera, including the early horse ancestor Mendozahippus fierensis. These discoveries reveal what strange creatures once roamed this landscape.
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