Interesting article on Teide.
Translated.
"The Teide the only area where there could be an eruption similar to Pompeii
A Plinian eruption, highly explosive as when the Vesuvius volcano destroyed Pompeii and Herculaneum, could only occur today in the Canary Islands in the central area of Tenerife, from an evolved magma chamber and residual under the Teide.
El Teide, the only area where there could be an eruption similar to Pompeii El Teide, the only area where there could be an eruption similar to Pompeii
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Natural Sciences Red Cross Design Volcanic eruption U.S Gran Canaria Tenerife Washington
This is indicated in an interview with Efe Julio de la Nuez, full professor of the Department of Edaphology and Geology at the University of La Laguna, and who has given a lecture on the "Explosive Vulcanism in the Canary Islands: Pliny and Hydromagmatic eruptions" in III Course of Geological Heritage of the Museum of Nature and Man of Tenerife.
Julio de la Nuez explains that at certain times in the Canary Islands there have been highly explosive and dangerous eruptions, such as the Plinian eruptions, which owe their name to the Roman historian Pliny, who witnessed the eruption of Vesuvius that destroyed Pompeii and Herculaneum.
In the Canary Islands, the only place where an eruption of this type could occur is in the central area of Tenerife, in the area of the Cañadas del Teide and its surroundings, because there is an evolved and residual magmatic chamber.
The geologist details that the most common basaltic melts come from deep layers, dozens of kilometers or more in the mantle, and usually reach the surface quickly and produce a rash with little time for that molten material to evolve.
But it can be, and this has happened in Tenerife and Gran Canaria millions of years ago, that these melts are paralyzed, remain in a camera or intermediate place at shallow depths -5 or 10 kilometers- for a long time and therefore evolve, that is, they change their composition to a different one: more viscous and with a higher content of gases that can generate highly explosive eruptions.
This is due to the fact that the basaltic melt, while cooling, loses part of its minerals, which are separated and change their composition to one with a higher content of silicas (more viscous) and at the same time accumulate more gases .
All this new composition does not have the previous properties "calmer" and over several thousand years it evolves to generate highly explosive eruptions.
The last eruptive process of this type occurred about 2,000 years ago and originated Montaña Blanca, in the vicinity of Mount Teide, details Julio de la Nuez, who specifies that a Plinian eruption like that of Vesuvius that destroyed Pompeii and that of Saint Helens volcano in the United States United could affect the entire island.
In Tenerife there have been highly explosive eruptions more than 200,000 years ago, in full boiling of the magma chamber under the caldera of Las Cañadas, and some devastated the island almost in its entirety.
A testimony of these processes are the strata of white color - produced by the fall of pumice stone - that came to cover the whole island and that are detected in areas such as Santa Cruz de Tenerife and Bajamar, in La Laguna.
"The good thing is that eruptions of this type are very spaced in time and are not usually long-lasting.In the case of Saint Helens in Washington, in 1980, it lasted only a few days." It was violent and rapid since in a matter of minutes a huge explosion that devastated several kilometers around the volcano, "explains the researcher.
In this type of eruptions there are also precursor signals that warn of the process, because the material of the magmatic chamber must be opened to 5 or 7 kilometers of depth and being viscous produces much seismicity.
https://www.larazon.es/historico/5853-el...zflg7bNh7g
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