Birth of Great Iguazú Waterfalls (Hidrology)
Iguazú is a combination of two words, Great Water. The language of these two words is Guarani. Guarani is a strong language. Some argue as a language it could disappear. It is a native South American language.

The Iguazú waterfalls where born about 100,000 years ago in the region known today as Triple Border. In that region the Iguazú river and the Parana river converged. Today triple border is the natural frontier between Brazil, Paraguay and Uruguay. The Parana river flowed and still flows over a geological fault that descends from North to the South. Waters from the hydrological cycle, mountains and other rivers flow into the Parana river. The Paraná river flows through that natural fault. This elevated fault was transversal and elevated the coasts. Local geologists say that the occidental Parana river coast was elevated 30 metres higher than the oriental coast.

Today the Parana river divides Argentina and Paraguay. As the fault moved the waters deepened seeking their base level. The Parana river found base level 80 metres from the coast. The Iguazú river which still flowed into the Parana now had to cascade and water began to fall 80 metres into the Parana. A strong process of erosion began. Know how the great falls where formed. Hydrology requires years of study and requires professional interpretation of data. Millenniums where needed for the waterfall to form. How will the great Watefalls evolve?