Eruption of Ethna
by Al Fio Bonina
Title
Eruption of Ethna
Artist
Al Fio Bonina
Medium
Photograph - Photography And Digital Manipulation
Description
Every dawn is a new day, also for our Etna. Explosions, lava flows, black and light lava earth covering our streets, our houses. It holds unforgettable surprises in store for us, wrapped up it frightens us, but it reminds us every day that we are part of this land, we are not its owners, but simple human beings...
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Featured in the Fine Art America groups:
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Eruptive history
Pre-ethnic eruptions
The beginning of Etna's formative process dates back to the Quaternary, starting from 600,000 years ago, where a large basin, the pre-etnean Gulf, is believed to have existed. Here, at the point of contact between the Euro-Asian sod in the north and the African sod in the south, there were the first underwater eruptions of very fluid basaltic lava with the birth of the first volcanic buildings. Evidence of these first eruptions can be found in the basaltic columns of Acitrezza and Motta Sant'Anastasia, as well as in the pillows of Acicastello. A second series of eruptions, this time of alkalo-basaltic type, is believed to have occurred between 200 and 100,000 years ago, giving shape to the so-called Monte Calanna, the main of the prehistoric volcanic cones. Of this structure today remain some dikes (residues of the "skeleton" of the volcanic cone) along the eastern side.
Birth of the Trifoglietto
About eighty thousand years ago a new volcanic complex, called Trifoglietto, erupted, more to the west than the previous one, of explosive type[2], which emitted viscous type lava. A second one more and more to NO, (Trifoglietto II), rose from the previous one, collapsing later on with it about 64.000 years ago giving origin to the immense caldera called Valle del Bove, one thousand meters deep and five thousand wide
Birth of Mongibello
Subsequent eruptions were alternating between basaltic lava and violent tufaceous explosions. As a result of these, after about 30,000 years, the Mongibello Antico was born, a western side cone to the previous ones. The phases of life of the Mongibello are, since its birth, rather swinging, with phases of tired and eruptive activity. Between eight thousand and seven thousand years ago there was a collapse of the western cone, indirectly testified also by the ancient sources[3]. According to a hypothesis following this collapse a huge tsunami towards the eastern and south-eastern Mediterranean [4]. The Strait of Messina would have instead acted as barrier to the tsunami toward the western Mediterranean, but it's not clear if it was due to seismic or eruptive causes. According to other theses there was not a single collapse, but a series of collapses in the course of time.
The lava from this period returned to be of the basaltic fluid type and the eruptive events, following the process of displacement towards the west, gave life to the new volcanic building of Mongibello.
Recent Mongibello
Since the collapse of the Mongibello Antico, Etna has reached a phase of relative quiescence that alternates with basaltic eruptions. The current volcano has many small side mouths, called adventitious craters, produced by the various eruptions over time. There are also some eccentric eruptive centers characterized by the non sharing of the volcanic conduit with the main volcano, but only of the magmatic basin, such as the Red Mountains and Mount Mojo[without source].
It is not possible to produce a complete chronology of the Etnean eruptions, in the historical period, because of the uncertainty or inaccuracy of the sources. Modern geological and stratigraphic research is progressively putting in order the indications based on historical memories; better witnessed are those from the 16th century onwards.
Source:https:https://it.wikipedia.org/wiki/Eruzioni_dell%27Etna
Uploaded
June 4th, 2020
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Viewed 3,402 Times - Last Visitor from Ann Arbor, MI on 03/29/2024 at 9:30 AM
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Comments (160)
Mary Machare
That must have been an amazing event to see! Your capture and processing makes it especially dramatic. LF
Gary F Richards
Outstanding Eruption of Etna composition, lighting, shading, color and artwork! Congratulations on your well deserved Special Feature of the Week! F/L
Bob Lentz
Congratulations! on this unique image’s being Featured in the “Dramatic Landscape, Skyscape, and Cityscape Photographs” group on FAA. The artist is encouraged to add the image to the group’s current “2022 Feature Archive” Discussion topic.