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Title
Mount Vesuvius Volcano
Artist
Giovanni Chianese
Medium
Photograph - Photography
Description
Vesuvius is a distinctive "humpbacked" mountain, consisting of a large cone (Gran Cono) partially encircled by the steep rim of a summit caldera caused by the collapse of an earlier and originally much higher structure called Monte Somma. The Gran Cono was produced during the eruption of AD 79. For this reason, the volcano is also called Somma-Vesuvius or Somma-Vesuvio.
The caldera started forming during an eruption around 17,000 (or 18,300) years ago and was enlarged by later paroxysmal eruptions ending in the one of AD 79. This structure has given its name to the term "somma volcano", which describes any volcano with a summit caldera surrounding a newer cone.
The height of the main cone has been constantly changed by eruptions but was 1,281�m (4,203�ft) in 2010.[16] Monte Somma is 1,132�m (3,714�ft) high, separated from the main cone by the valley of Atrio di Cavallo, which is some 5�km (3.1�mi) long. The slopes of the mountain are scarred by lava flows but are heavily vegetated, with scrub and forest at higher altitudes and vineyards lower down. Vesuvius is still regarded as an active volcano, although its current activity produces little more than steam from vents at the bottom of the crater. Vesuvius is a stratovolcano at the convergent boundary where the African Plate is being subducted beneath the Eurasian Plate. Layers of lava, scoria, volcanic ash, and pumice make up the mountain. Their mineralogy is variable, but generally silica-undersaturated and rich in potassium, with phonolite produced in the more explosive eruptions. (Wikipedia)
Uploaded
September 19th, 2016
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Viewed 105 Times - Last Visitor from White Plains, NY on 03/27/2024 at 10:35 PM
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