Shield volcanoes are distinguished by their broad, gently sloping profiles, resembling a warrior’s shield. These are primarily formed by the eruption of low-viscosity lava that flows over great distances. Eruptions are typically less explosive and consist of a steady flow of lava. Mauna LoaandMau...
ash and other volcanic materials. However, volcanoes can actually erupt in a range of different ways. A volcano can erupt in a range of different ways during different eruptions and even during different stages in the same eruption.
Erupting volcanoes can pose many hazards, not only in the immediate vicinity of the eruption. One such hazard is that volcanic ash can be a threat to aircraft, in particular those with jet engines where ash particles can be melted by the high operating temperature; the melted particles then a...
First of all, the active volcanoes are divided into two groups according to the frequency of eruption. One includes those volcanoes which are literally active with eruptions every few years; they usually have a persistent open crater from which the eruptions are taking place. Another includes ...
Figure 1. Mount St. Helens was a beautiful, classic, cone-shaped volcano. The volcano’s 1980 eruption blew more than 400 meters (1,300 feet) off the top of the mountain. Composite Volcanoes Composite volcanoesare made of felsic to intermediate rock. The viscosity of the lava means that ...
Volcanologists classify eruptions into several different types. Some are named for particular volcanoes where the type of eruption is common; others concern the resulting shape of the eruptive products or the place where the eruptions occur. Here are some of the most common types of eruptions:Table...
There are three primary types of volcanoes, each with unique physical characteristics and eruptive natures. Composite volcanoes are explosive, towering giants. Shield volcanoes quietly produce broad, massive structures through lava flows. Cinder cone vol
Typesofvolcaniceruptions Twopredominanttypesofvolcaniceruptions:1.Effusiveeruptions–magmarisesthroughthesurfaceandflowsoutofthevolcanoasaviscousliquidcalledlava.2.Explosiveeruptions–magmaistornapartasitrisesandreachesthesurfaceinpiecesknownaspyroclasts.Whydovolcanoesbehaveinsuchdifferentways?Whetheravolcanowillerupt...
Some of the most famous effusive volcanoes include Kilauea in Hawaii and Etna in Italy. These volcanoes are known for their long-term eruptions that produce large amounts of lava. Explosive Eruption Explosive eruptions are less common than effusive eruptions, but they can be much more violent. ...
A year after the eruption, of Europe and North America were so cold it was known as the year without summer!2) Volcanoes are often dangerous and, able but they can be helpful too. They give many treasures, such as diamonds, gold and, nature of the ash and rocks are used in many ...