Volcano, Volcanic Volcano And Volcanic Ash

One physical factor which causes differences in a volcanic hazard is the steepness of the volcano. If the volcanoes sides are of a steep gradient then the

Feel free to stretch, it's been a long ride. We will be stopping by a restaurant later to get some lunch. In front of you, you can see Humphreys Peak, the tallest mountain in the San Francisco Peaks. The San Francisco Peaks is actually a volcanic mountain range and is part of the San Francisco volcanic field. The peaks were once a stratovolcano but is now eroded and are the remains of the volcano. It is the only stratovolcano in the San Francisco Volcanic Field. The tallest mountain, Humphreys Peak, is about twelve thousand, six hundred and thirty-three feet in elevation, which is also three thousand, eight hundred and fifty-one meters tall. In fact, Humphreys Peak is the tallest point in all of Arizona. Also in this area, are more than six hundred volcanoes. Most of the volcanoes found here are basalt cinder cones. These volcanoes are relatively small. They are also usually less than one thousand feet in elevation. Another fact about these basalt cinder cones is that they are formed within a range of a couple of months to a couple of years. The San Francisco Volcanic Field also has several lava domes. Lava domes are formed by dacite and rhyolite magmas. Both of those types of magma are very rich and high in silica. So, as a result, the dacite and rhyolite magmas are very viscous and thick. As a matter of fact, the magmas are so viscous is thick that when volcanoes erupt, the magma tends to pile up and form very steep sided masses, which are the domes.

Anpother factor that can have an impact on the level of hazard posed by a volcano is the type of plate margin on which it occurs. Volcanoes occuring at constructive plate boundaries are usually much less violent than those occuring at destructive plate boundaries. This is because the magma produced by plates moving apart is Basic, and therefoe has a low viscosity, allowing it to flow easily. The lava is produced from a central vent or fissure and erupts regularly but not usually violently. Also,constructive plate boundaries are often found under the sea and create submarine volcanoes, such as along the Mid-Atalntic ridge, so pose few threats to humans. As a result, the hazards posed by volcanoes at constructive plat eboundaries is relatively low. However, the subduction of one plate under another at destrctive plat eboundaries can form an acidic magma chamber, due to the build up of intense heat. Acidic magma is very viscous and resisitant to flow, meaning that there is often a huge build up of pressure, which can result in very violent and dangerous eruptions involving ash and pyroclastic flow. This can pose a a serious hazard. Pyroclastic flowsa are extremely dense, containing toxic gases at very high temperatures, and can move at speeds over 100km/h. The consequences of such an unpredictable hazard can be extremely seruous

The Earth’s outer crust is made up many tectonic plates that move over the surface of the planet. When the plates come collide, volcanoes will form sometime (National Ocean Service). Volcanoes can also form in the middle of a plate, where magma rises upward until it erupts on the sea floor, at what is called a “hot spot” (National Ocean Service). A hot spot is a plume of magma or molten rock that rises from within the Earth then reaches the surface forming underwater volcanoes which may grow tall enough to

To begin, a volcano is a mountain with an opening in the top or side that sometimes sends out rocks, ash, lava, in a sudden eruption (Merriam-Webster, n.d.). A volcano erupts when pressure builds inside the mountain. Magma, lava while it is inside the volcanoe, pushes through the weakened crust. When this built up pressure is released, Earth’s plates move causing a volcanic eruption. Also, dangerous flows of steaming lava can reach up to 2,000

There are basically two types of volcanos: the active and the inactive ones. And just like in the movies, once the volcano erupts, its lava melts everything

Volcanos typically formed as a consequence of plate tectonics. In fact, they tend to form when plates converge into each other. In the process of subduction, one plate of the lithosphere, cupped by oceanic crust, slides beneath another one, giving origin to a subduction zone. While sliding down, heat is generated and water is released, causing the formation of magma that rises up to the surface and forms volcanos parallels to overriding plate. The Pacific West region of the United States is known for presenting this type of structure in which the oceanic lithosphere pushes towards the continent and sinks down into the asthenosphere.

Volcanoes can be found throughout the entire world and are formed when there is a rupture in the mantle of the Earth's crust. This effect allows the output of volcanic lava, ash, and various types of gases. These tectonic plate breaks are normal, the planet Earth is divided into 17 tectonic plates and consistently move against each other forming shifts from low to high intensity. It can cause displacement of earth or water.

Cinder cone volcanoes (also called scoria cones) is an easily recognized volcano. These volcanoes mainly consist (little in size) loose, grainy cinders which is consisting normally of basaltic and a andesitic material but there is almost no lava. Cinder cones are generally small volcanoes (compared to other volcanoes). They are usually only around a mile across in width and up in height, about 1,000 feet high. They have quite steep sides and will usually have a regularly small crater on the top of the volcano. Often the cinder cones are put into a higher class of volcano (they are a major type of volcano). Cinder cone volcanoes are one the most common volcanoes and they generally what we think of when we think volcanoes. Airborne fragments

A volcano is a vent where magma erupts when the volcano is active. They can be in a variety of shapes, from cone-shaped to craterlike. If a volcano is dormant for 10,000 years it is deemed extinct. But what forces the magma out through the crust? “Volcanoes are just a natural way that Earth and other planets have of cooling off and releasing internal heat and pressure,” explains Oregon State University. Magma is extremely hot and thus not as dense, so it will rise depending on the weight of the rocks around and above it. As it rises, the gas forms bubbles that “exert tremendous pressure,” the University

Volcanoes exist all around the world. My volcano is Mount Rainier before we get into that here are some things about all volcanoes. A volcano is a point in the earth where magma pushes up through the crust and spits out ash,gas and lava. Volcanos can be deadly, the gas can kill you and the ash can burn also bury you. There are different kinds of lava, one is called pahoehoe it is a fast moving lava that is smooth looking. Another one is aa, a slow moving lava that is sharp looking like glass. There are also different kinds of lava flows, one is the pyroclastic which is an explosive lava flow that throws out rocks and lava. The magma/lava comes from a chamber in the crust called the magma chamber. There is a long pipe that takes the magma/lava

The first stage of a volcano erupting begins with some sort of blockage in the vent of a volcano. The vent lets magma and gases release without an eruption. According to Milton Kazmeyer, the vent can become blocked because of either internal or external reasons. Sometimes the blockage is due to the magma trying to flow to the surface, but it becomes too thick and viscous, and instead of escaping peacefully, it ends up plugging the vent as it ascends. Other times, the rim of a volcano collapses and fall backs into the vent, blocking it with the debris. The blockage prevents the release of gases that are trapped in rhyolitic magma, which has a high viscosity. The higher viscosity of a magma, the faster the lava will flow after eruption. A build up of rhyolitic magma prevents the release of trapped gas and the rocks then begin melting inside the Earth's crust, forming magma. The magma is lighter than the solid rocks that are surrounding and this causes it to rise and collect in magma chambers underneath the volcano (Stages of a Volcano Eruption).

Volcanoes exist all around the world. A volcano is where ash, gases, and molten rock from 30-120 feet underground erupts onto the surface. The ash, gases, and molten rock all stay in something inside a volcano called a magma chamber. The larger the eruption the more gas the magma has. The gases include water vapor, carbon dioxide, and sulfur dioxide. The two types of lava are aa (ah-ah) and pahoehoe. The types of volcanoes are shield, strato, silicic caldera complexes, monogenetic fields, mid-ocean ridges, and flood basalts.

Stratovolcanoes or composite volcanoes are steep sided and symmetrical, examples include Mount Kilimanjaro, Mount Rainer, and Mount Fuji. The peaks of composite volcanoes are built of alternating layers of pyroclastic debris capped by high viscosity andesitic to rhyolitic lava flows that solidify to form protective caps (Abbott 2014). Magma of stratovolcanoes is of high

This is only a general overview of the inner workings of volcanoes and their eruptions. For more infomation, visit Volcano World -- The Premier Source of Volcano Info on the Web.