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Transcript of Mount Vesuvius
Shield volcanoes form when magma from the mantle reaches the surface and turns into lava, ash, and gases. Over the years, eruptions from the volcano build up layers of ash, tephra, and lava. These layers build up the volcano. The main difference in a shield volcano and the other types is the magma. Shield volcanoes have basaltic magma.
Cinder-cone volcanoes are simple volcanoes that have a bowl shaped crater at the top. They usually only grow to about 1,000 feet. They are built up by lava and not ash. When the volcano erupts, tiny bits of lava fly into the air and come back down and land on the volcano to make it grow.
Composite volcano are built up by alternating layers of lava, and tephra. This has granitic magma. Granitic magma is high in silica, this means that it will erupt violently. Mt. Vesuvius was formed like a composite volcano. Volcanoes impact our earth a lot. The three major gases of our atmosphere: nitrogen, oxygen and argon.
Volcanoes affect our earth economically when the gases from the volcano combine with water and produce acid rain, killing crops and livestock. Plants and animals are affected by eruptions. When a volcano has erupted the flows can cover the plants or animals, burning them. Temperature change can also affect the habitat of the animal or plant.
Mount Vesuvius affected the earth from the ash and other gases. The eruption also destroyed Pompeii which was covered in mud flows after the eruptions. Ecology! Mount Vesuvius is a great volcano in Sicily,Italy with plenty hikes to explore. At the summit we can catch a glimpse of the crater at 3,900 feet (1,200 meters). Mount Vesuvius is one of the smallest Volcanoes in the world.
*The smallest Volcano is 1,312 feet. The Largest volcano is 22,589 feet.
Mount Vesuvius has been around for 17,000 years and has had over 100 eruptions. The most Famous eruption was in 79 A.D.
This eruption destroyed Pompeii, which was one of the largest towns in Campania, and had a population of about 20,000 at the time. And at Herculaneum, the population was about 5,000. The eruption preceded a large earthquake in A.D. 62, and repairs were still going on when Mt. Vesuvius erupted. As suggested by Seneca, a Roman philosopher, the earthquake is thought to be a previous event to the eruption indicating an increase in magmatic pressure. Also 600 sheep were poisoned by "baleful air" (probably carbon dioxide). .
The last eruption was in 1944. Tour! If you live near an active volcano always keep goggles, an emergency kit, a flashlight and battery operated radio.
If a volcano erupts in your area, evacuate only if necessary and if an authority has told you so.
Before you leave, put on a long sleeve shirt and long pants.
Put on goggles, or eye glasses, no contacts.
Wear a emergency mask or cover your mouth with a damp cloth.
If you do not evacuate close windows, cover chimneys and any openings, so ash cannot get in. Safety! Shield Cinder-Cone Composite There are two different types of magma. Basaltic and granitic. Basaltic magma has hardly any silica. Silica makes magma stiff and thick. Because basaltic magma has low silica levels, the eruptions will not be explosive. They will not be explosive because there is not any pressure. Granitic magma is high in silica. This means that it will erupt violently. It will erupt violently because it is holding in a lot of pressure. Mt. Vesuvius has granitic magma. This means that it will erupt violently. 1944 eruption.
Photo by U.S Navy. The End