Volcano: A hill or mountain formed around and above a vent by accumulations of erupted materials, such as ash, pumice, cinders or lava-flow. The term refers both to the vent itself and to the often cone-shaped accumulation above it. (Scarth, 1994.) This definition can do Mt. Vesuvius no justice.
According to Universetoday.com it states that there are fifteen different parts of a volcano and they all help a volcano be dangerous. Volcanoes are very dangerous mountains and can destroy everything on earth. Volcanoes still amaze the people living on earth, even though they cause lots of destruction. They cause destruction in all sorts of ways and in all shapes and sizes. Since the beginning of time volcanoes have caused major damage like destroy nature and cities, but even though they cause destruction on earth they still surprise humans.
They stretched from the southern tip of South America, along the coast of North America, across the Bering Straight, down through Japan and into New Zealand. What some people did not know is that The Ring of Fire actually has two other names to go along with it. One is called “Circum-Pacific Belt”, and the second is “Pacific Ring of Fire.” Some of the biggest volcanic eruptions has happened along The Ring of Fire. It also, contains some of the largest volcanoes and mountains in the world. One example is Mount Saint Helens.
These differences are in the makeup of the volcano, the impact on society, and the eruption itself. Mount Saint Helens, used to be a wonder of the world, but now a damage site of what happened on May 18, 1980. Mauna Loa is a tourist destination and one of the most active dispensers of lava and magma in the world. As shown, these volcanoes can’t be more different. Yet, each volcano has been a culprit to destruction, and have similarities within themselves.
Lava domes are created by small masses of lava which is too thick to travel far . Lava dome grows by lav expansion within the volcano , according to Universe Today . Cinder cone volcanoes are formed by lava fragments which land near a volcano vent to eventually create a circular shaped cone with a crater on top , according to Universe Today . Cinder cone volcanoes are the most common type of volcano . 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.
A volcano I an opening in earth's crust, by molten rock and gas.Most of the Earth's volcanoes are located around the Pacific Ring of Fire because that the location of most of the Earth's subduction zones.When lava erupts it is made up of a slush of crystals, liquid, and bubbles. The liquid freezes to form volcanic glass. Chemically lava is made of the elements silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium. There are 4 different types of volcanoes.There are Extinct, Dormant, Active and Mud volcanoes. The most popular volcano an Active Volcano.
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
First the volcano will have an explosive eruption that ejects huge amounts of steam, gas, and ash. This is followed by the ejection of lava. Most composite cones are built of layers of fragment materials and flows of lava, all inclined outward away from the vent. Both Etna, in Sicily, and Vesuvius, near Naples are examples of composite cones. The most common type of volcanic cones are stratovolcanoes.
Volcanoes are conical structure built by discharge of lava. The dome- shaped structures not only have increased beauty of the nature and make it look magnificent but on the other hand they are extremely dangerous as they contribute to create huge catastrophes. As an illustration, the word volcano is originated from the name Vulcan, which means the god of fire in Roman. Centuries ago people believed that the eruption of volcanoes are a supernatural for instance, in Polynesia, there is a peak called Pele’s peak where people thought that the eruption was caused whenever, Pele the god of volcanoes were angry. All the misconception was because people were living a centuries of blindness where technologies weren’t used and people believe on what they heard but today with the advance of technology and intellectualism we know that volcanic eruptions are not super natural, but are the form due to the listen Volcanic eruptions may create lanscapes such as, mountains, plateaus, plains and fertile fields, but on the other hand it may also destroy landscapes.
Volcanoes have been around for many centuries and will continue to exist for many more to come. Many people have their ideas of what they believe volcanoes are. Most believe that it is basically a mountain that shoots out lava, destroying anything and everything nearby. This assumption is actually proven accurate. Volcanoes are considered one of the most dangerous natural disasters; they can erupt suddenly, destroying everything in its way.