Laguna del Maule (volcano) 2017. The Chilean National Geology and Mining Service monitors the volcano. Laguna del Maule (volcano) Laguna del Maule is a volcanic field in the Andes mountain range of Chile, close to, and partly overlapping, the Chile-Argentina frontier. The bulk of the volcanic field is in the Talca province of Chile's Maule Region. It is a segment of the Southern Volcanic Zone, part of the Andean Volcanic Belt. Many of the volcanic centres in the Laguna del Maule volcanic field formed during postglacial times, after glaciers had retreated from the area. This activity has generated cones, lava domes, lava coulees and
Laguna del Negro Francisco the lake is formed by alluvial fans and in the eastern sector by alluvial deposits such as gravels, sands and silts. A number of mountains surround the lake, such as the high Copiapó and the Jotabeche. The Astaburuaga River enters the lake on its eastern shore; it originates on the mountains east of Laguna del Negro Francisco where it is nourished by snowmelt. Other tributaries are the Quebrada Azufre in the northwest, Rio de la Sal in the northeast and Rio La Gallina in the southwest; the tributaries of Laguna del Negro Francisco feature wetlands and marsh vegetation has developed