Thanks to the non-existent slope, water flows peaceful and gentle through the flat steppe. Watercourses draw sinuous trails, characterized by pronounced curves known as meanders that form due to small variations in the velocity of the current.

When waterflow is slightly faster on one of the riverbanks, the current erodes said border, excavating it until it curves. At the same time, a slower current on the opposite bank causes more sediments to accumulate, enriching the internal border of the curve. As the meander becomes more pronounced, the velocity difference of the current increases, enhancing the excavation of one bank and the thickening of the opposite.

Downriver, the current now flows unbalanced, which causes a new curve to be excavated, opposite to the meander upriver. Thus begins an incessant, positive feedback loop, where the waviness of watercourses is only accentuated and extended throughout the steppe, feeding the meadows that host most of the native fauna and that have become the essence of austral estancias.