The Abaucán is a river in Argentina which flows through the provinces of Catamarca and La Rioja, areas with very low precipitation. The river water is provided by the ingress of two larger rivers, the Fiambalá and the Chaschuil.
It begins in the north of the Tinogasta Department of Catamarca Province, at the confluence of several rivers created by the melting of snow and precipitation in the high Andean peaks, such as the volcano Nevado Incahuasi at 6,638 metres (21,778 ft), Cerro El Muerto at 6,488 metres (21,286 ft) and Cerro Negro of Laguna Verde at 5,764 metres (18,911 ft), which dominates in addition the basin of Salina of Laguna Verde. At first the river is called Río Chascuil, then, after having received a stream on the right, the collector of Cerro Cenizo, elevation 5,227 metres (17,149 ft), it becomes the Río Guanchín down to the spa town of Fiambalá where there are hot springs.