Laguna del Maule (Caldera)
| Laguna del Maule | ||
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 Laguna del Maule |
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| height | 3092 m | |
| location | Chile , Región del Maule | |
| Mountains | To the | |
| Coordinates | 36 ° 3 '34 " S , 70 ° 29' 35" W | |
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| Type | Caldera | |
| rock | Rhyolite , rhyodacite | |
| Last eruption | Holocene (possibly about 2,000 years ago or younger) | |
The Laguna del Maule is a caldera measuring around 15 × 25 km in the Chilean Andes, a small part also extends into Argentine territory. Inside the caldera is the dammed lake Laguna del Maule , which is also the origin of the Río Maule . The caldera also contains several small stratovolcanoes , lava domes and pyroclastic cones, which were formed in the Pleistocene and Holocene .
In the volcanic area of the Laguna del Maule, lava with high levels of silicate often emerges ( rhyolite , rhyodacite ). Within the last 25,000 years there have been 36 volcanic eruptions, some of them very violent. Between 2007 and 2014, unusually high uplift rates of around 25 centimeters per year were recorded in the caldera , the highest recorded so far in a volcano that is not directly active. These are to be interpreted as an indication of magma flowing into a reservoir at a depth of about 5 km. Large rhyolite eruptions are only known from the past, but it is assumed that they are heralded by longer-term signs. The Laguna del Maule volcanic area is therefore an important seismological research object.
Individual evidence
- ↑ Mega volcano shortly before the eruption? Scinexx.de, December 2, 2014
- ↑ Brad S. Singer et al .: Dynamics of a large, restless, rhyolitic magma system at Laguna del Maule, southern Andes, Chile , GSA Today, Vol. 24, December 12, 2014, pp. 4–10
- ^ New International Collaboration Investigates the Laguna del Maule Volcanic Field, Chile; November 25, 2014
Web links
Laguna del Maule in the Global Volcanism Program of the Smithsonian Institution (English)