In this paper, I will be discussing volcanoes in general. In addition, Mt. Vesuvius, in particular, will be thoroughly looked at, as well as its 79 AD eruption. Volcanoes have long been depicted as nature’s killer. In movies, Volcanoes are seen as mountains of fire and spitting lava; their only purpose seems to be to kill and destroy everything in their path.
Lava tubes are tunnels formed from fluid lava. As the lava flows, its exterior covering cools and hardens. But the lava below continues to flow. After the flowing lava drains away, it leaves a tunnel. Rock Fragments Rock fragment are usually called tephra and are formed from sticky magma.
Pyroclastic flows have hot ash, rock fragments, and gas in them. These flows of hot ash, rock fragments, and gas are deadly because of their high temperatures of 850° C. Also they a... ... middle of paper ... ...nbsp; Resources USGS "Types of Volcanic Eruptions" Http://pubs.usgs.gov/gip/volc/eruptions.html USGS "MSHNVM and CVO" Http://vulcan.wr.usgs.gov/Volcanoes/MSH/ImageMaps/SWWash/swwash_map.html "MSH Map, Cross-sections, and Time-depth Plot" Http://spike.geophys.washington.edu/SEIS/PNSN/HELENS/mshfigs.html "Simplified Eruptive History of Mount St. Helens" Http://vulcan.wr.usgs.gov/Imgs/Gif/MSH/Graphics/EruptiveHistory/msh_eruptive_stages.gif Edward W. Wolfe and Thomas C. Pierson, 1995, "Volcanic-Hazard Zonation for Mount St. Helens Washington, 1995": USGS Open-File Report 95-497 Http://vulcan.wr.usgs.gov/Volcanoes/MSH/Hazards/OFR95-497/OFR95-497.html "Encart Reference, Volcano, Types of Volcano" © 1993-2000 Microsoft Corporation Http://encarta.msn.com/find/concise.asp?ti=761570122&sid=20#s20 "Volcano," Microsoft® Encarta® Online Encyclopedia 2000 © 1997-2000 Microsoft Corporation Http://encarta.msn.com/find/concise.asp?mod=1&ti=761570122&page=3#s22vb Nas.N
There are giant plates under the surface of the Earth or the crust. These plates are constantly moving which means that they are bound to bump into each other at some point. A volcano is formed at a convergent plate boundary. A convergent plate boundary is formed when two plates hit each other and one plate goes under the other. When that plate is pushed down it melts from the heat of the mantle and turns to magma.
Volcanoes are made up of different layers of the earth. Many things can occur after a bad eruption. There are 3 main things that can happen. They are Hot Springs, Calderas and Mud spots.Hot Springs occur when magma beneath the surface heats up the water in the cracks overlying rocks. Calderas happen when a massive blast of lava empties a volcano's magma chamber and causes the volcano to collapse on itself.
Volcanoes Volcanoes are natural phenomena which are on the Earth’s surface through which molten rock and gases escape from below the surface (Tarbuck, 139). These volcanoes are very interesting to observe and to study because of their amazing occurrences and majestic lava eruptions. Volcanoes have been studied ever since the beginning of mankind and the word “volcano” is thought to be derived from Vulcano, a volcanic island in the Aeolian Islands of Italy whose name in turn originates from Vulcan, the name of a god of fire in Roman mythology. Consisting of several types, volcanoes can extrude several forms of magma and can also release multiple gases. These extruded materials can affect the Earth’s structure and atmosphere.
This eruptions cause a leatral blasts ,lava flows , hot ash flows and many other disaster . Some eruptions can knock down enter forests and cause trigger tsunami and earth quakes. Comes out of volcanoes when its eruption Regolith solid and molten material (lava) and gases. Rock debris: emerges as a result
One type of volcanic eruption is when magma rises through the surface and comes out of a vent as a lava flow this is called an effusive eruption. Magma is torn to bits called pyroclasts as it makes it’s way to the surface this is an explosive eruption , according to volcano.oregonstate.edu . Volcanoes are destructive in their own way
Toxic gases and rocks shoot up through the opening, overflowing the air with hot lava fragments. This can bring floods, avalanches, and can even provoke tsunami and earthquakes. How are they formed? Volcanoes are created when magma from within the Earth's crust rises to the surface. At the surface of the volcano, the manga erupts to form lava flows and ash deposits.
The Range of Physical Phenomena that are Associated with Volcanic Hazards Volcanic eruptions bring with them a large range of hazards. This report will describe the different range of hazards associated with volcanic activity and discus possible ways that hazards can be avoided. A volcanic eruption can, force people to leave their homes, damage sources of water, destroy homes and farms, restrict travel and kill. Pyroclastic flow is a flow of volcanic rock, and the most devastating effect of an explosive eruption. A pyroclastic eruption is one in which the great majority of activity involves fountaining or explosions.