Laguna del Maule (volcano) about fourteen shield volcanoes and stratovolcanoes that have been degraded by glaciation. The Laguna del Maule volcanic field covers a surface area of and contains cones, lava domes, lava flows, and shield volcanoes. There are 130 volcanic vents at Laguna del Maule. The lake is surrounded by 36 silicic coulees and lava domes. Over of the field is covered by these rocks, and volcanic ash and pumice produced by the eruptions has been found in Argentina. Presently some summits around Laguna del Maule reach altitudes of . The volcanic field lies at an average height of . Among the various
Washdyke Lagoon erosion in order for the lagoon to remain separate from the ocean. This balance is also effected by sea level changes, rising causing the barrier to be overtopped and falling allowing a smaller barrier keep the lagoon separate. There are many examples of these relatively closed lagoon systems around the world. Most have significant ecological value, so preserving the balance between fresh and salt water is important. Examples include the Coorong, Australia, 260 km, Laguna de Araruama (Brazil, 10,360 km), Lake St. Lucia (South Africa, 312 km) and Lake Songkhla (Thailand, 1,040 km). If the sediment sources for these barriers