Volcanoes are one of the most destructive yet fascinating geological land forms in our natural environment. They consist of a fissure in the earth's crust above which a cone of volcanic material has accumulated. The cone is formed by the deposition of molten or solid matter that flows from the interior of the earth through an indented vent, called a crater, which is found at the top of the cone. In this report I will discuss different states of volcanic activity, different forms of volcanoes and their properties and locations. Some volcanoes are more active than others. Some are even in a state of constant eruption an example of this is Izalco, located in El Salvador, it first erupted in 1770 and has been in a state of eruption ever since. In a belt that circles the Pacific Ocean their are many active and erupting volcanoes. For obvious reasons this area is referred to as the Ring of Fire. The activity of the volcanoes varies , for example, Vesuvius will continue in a state of moderate activity for long or short time periods and will then become stagnant or in-active for months. If an eruption succeeds prolonged dormancy it will usually be fairly violent, as was the eruption of Mount Saint Helens after 123 years of stillness. The potential danger of an active volcano can be seriously threatening to civilization for more reasons than just the initial eruption of molten rock, disasters, such as mud flows, triggered by an eruption are also serious hazards. Composite cones are formed from a combination of eruptions. 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.
These are words that most people associate with volcanoes. But some good effects can come out of volcanoes. ... Out of the 550 of the world's active volcanoes, the world's largest active volcano is Mauna Loa, it is one of the Hawaiian islands. ... Then there are underwater volcanoes and above ground volcanoes. ... This is the only volcano found on the planet mars. ...
These are words that most people associate with volcanoes. But some good effects can come out of volcanoes. ... Out of the 550 of the world's active volcanoes, the world's largest active volcano is Mauna Loa, it is one of the Hawaiian islands. ... Then there are underwater volcanoes and above ground volcanoes. ... This is the only volcano found on the planet mars. ...
How are volcanoes formed? Are there different types of volcanoes? ... Volcanoes are formed in different ways. ... These consist of the shield volcanoes, strato (composite) volcanoes, and caldera complex volcanoes. ... It is classified as a complex volcano, so it is an explosive and very steep strato volcano. ...
The term volcano refers to the opening or vent through which the molten rock and associated gases are expelled. ... Instead, volcanoes are built by the accumulation of their own eruptive products. ... Geologists have generally grouped volcanoes into four main kinds: cinder cones, composite volcanoes, shield volcanoes, and lava domes. ... When rock from the mantle melts, moves to the surface through the crust, and releases pent-up gases, volcanoes erupt(explode). ... With many volcanoes erupting only every few hundred or thousand years, it's not possible to monitor every site. ...
This report features what are volcanoes, how are they formed and where are they located. It also has a recent occurrence of a volcano eruption and how did the community react to it. Volcanoes are mountains formed out of lava and ashes through an opening in the earths crust. ... After many eruptions volcanoes expand. There are two ways that volcanoes are formed. ...
Some of the most famous composite volcanoes include Mount St. ... At 6,893 meters in elevation, not only is it the highest active volcano in the world, but Ojos del Salado is the highest active volcano in Chile and the second highest active volcano in the Southern and Western Hemispheres. ... The Mayon Volcano is 2,462 meters in elevation and is a symmetrical composite volcano. ... Another harsh eruption from the Mayon Volcano was in 1993. ... Interesting facts such as how high a volcano's elevation is or how many deaths it caused makes a volcano well-known to the public eye. ...
A volcano can erupt many times in its lifetime. ... There are three major types of volcanoes, cinder cone volcanoes, composite volcanoes, and shield volcanoes. ... The second major type of volcano, the composite volcano, in contrast to the cinder cone can grow much larger. One famous example of a composite volcano is Mt. ... The third type of volcano is the shield volcano. ...
Volcanoes A volcano is a vent in the earth's crust through which magma (molten rock) and gas are released. ... Types of Volcanoes There are three different types of volcanoes that can be formed around a vent. ... Since these volcanoes consist of loose materials they do not grow as large as other volcanoes. ... The third type of volcano is the composite volcano. ... I then molded a volcano shape out of the clay. ...
This cone is what we know as a volcano. There are several ways in which a volcano can form, just as there are several different kinds of volcanoes. Among the different kinds of volcanoes are shield volcanoes, cinder cones, and composite volcanoes. The most majestic of the volcanoes are composite volcanoes, also known as strato-volcanoes. ... There are two types of shield volcanoes, Hawaiian volcanoes and Icelandic. ...
