How do you classify a volcano?
Volcanoes are classified as active, dormant, or extinct. Active volcanoes have a recent history of eruptions; they are likely to erupt again. Dormant volcanoes have not erupted for a very long time but may erupt at a future time. Extinct volcanoes are not expected to erupt in the future.Apr 5, 2019
What are the three types of volcanoes based on volcanic features?
There are three types of volcanoes: cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes), and shield volcanoes.
What are the 3 types of volcanoes?
The Three Classic Types of VolcanoesCinder Cone Volcanoes.Composite Volcanoes (Stratovolcanoes)Shield Volcanoes.
What are the parts of a volcano?
The main parts of a volcano include the magma chamber, conduits, vents, craters and slopes. There are three types of volcanoes: cinder cones, stratovolcanoes and shield volcanoes.Nov 19, 2018
What are volcanoes describe different types of volcanoes and their characteristics?
There are three main types of volcano - composite or strato, shield and dome. Composite volcanoes, sometimes known as strato volcanoes, are steep sided cones formed from layers of ash and [lava] flows. The eruptions from these volcanoes may be a pyroclastic flow rather than a flow of lava.
How will you differentiate the types of volcanic eruption?
There are two types of eruptions in terms of activity, explosive eruptions and effusive eruptions. Explosive eruptions are characterized by gas-driven explosions that propels magma and tephra. Effusive eruptions, meanwhile, are characterized by the outpouring of lava without significant explosive eruption.
What are the 5 characteristics of volcano?
What are the characteristics and forms of volcanoes?Acidic lava, which is very viscous (sticky).Steep sides as the lava doesn't flow very far before it solidifies.Alternate layers of ash and lava. For this reason, they're also known as stratovolcanoes . ... Violent eruptions.Longer periods between eruptions.Feb 9, 2022
What are the classification of volcanoes as adapted by the Phivolcs?
PHIVOLCS classifies volcanoes as active, potentially active, or inactive.
Which of the following best describe a volcano?
Expert-verified answer - It is a conical-shaped landform that is built by repeated eruptions. - Volcanoes are different than other mountains they are not formed by uplift and erosion. - A volcano is built around a vent that connects with reservoirs of molten rock. - It is built by the slow accumulation of erupted lava.Oct 20, 2020
What does the top of a volcano look like?
At the top of the volcano, at its highest point, is a crater. Some volcanoes have something called a caldera. A caldera forms when a volcano gets hollow and then collapses on itself. A caldera could look like a large indentation on the side of the volcano or it could happen at the very top.
What are the classification of volcano in terms of cone?
Volcanoes are classified by the eruption type and by the volcanic cone shape. There are three basic cone shapes and six eruption types. The three cone shapes are cinder cones, shield cones, and composite cones or stratovolcanoes.
What is the basis of classifying volcanoes as active or inactive?
Put simply, the most popular way for classifying volcanoes comes down to the frequency of their eruption. Those that erupt regularly are called active, while those that have erupted in historical times but are now quiet are called dormant (or inactive).Sep 19, 2016
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How to classify volcanoes?
Active, Dormant, or Extinct? One of the simplest ways to classify volcanoes is by their recent eruptive history and potential for future eruptions. For this, scientists use the terms "active," "dormant," and "extinct.". Each term may mean different things to different people. In general, an active volcano is one that has erupted in recorded ...
What are the three types of volcanoes?
Students are usually taught three main types of volcanoes: cinder cones, shield volcanoes, and stratovolcanoes . Cinder cones are small, steep, conical piles of volcanic ash and rock that have built up around explosive volcanic vents. They often occur on the outer flanks of shield volcanoes or stratovolcanoes.
What is an active volcano?
In general, an active volcano is one that has erupted in recorded history—remember, this differs from region to region—or is showing signs (gas emissions or unusual seismic activity) of erupting in the near future. A dormant volcano is not active but is expected to erupt again, while an extinct volcano has not erupted within the Holocene epoch ...
What type of volcano is a shield volcano?
Shield volcanoes are large, often many miles wide, and have a gentle slope. They are the result of fluid basaltic lava flows and are often associated with hotspot volcanoes. Stratovolcanoes, also known as composite volcanoes, are the result of many layers of lava and pyroclastics.
What plate boundary do volcanoes occur at?
Around 90 percent of volcanoes occur at convergent and divergent (but not transform) plate boundaries. At convergent boundaries, a slab of crust sinks below another in a process known as subduction. When this occurs at oceanic-continental plate boundaries, the denser oceanic plate sinks below the continental plate, bringing surface water and hydrated minerals with it. The subducted oceanic plate encounters progressively higher temperatures and pressures as it descends, and the water it carries lowers the melting temperature of the surrounding mantle. This causes the mantle to melt and form buoyant magma chambers that slowly ascend into the crust above them. At oceanic-oceanic plate boundaries, this process produces volcanic island arcs.
What causes the mantle to melt?
The subducted oceanic plate encounters progressively higher temperatures and pressures as it descends, and the water it carries lowers the melting temperature of the surrounding mantle. This causes the mantle to melt and form buoyant magma chambers that slowly ascend into the crust above them.
What is divergent boundary?
Divergent boundaries occur when tectonic plates pull apart from each other; when this occurs underwater, it is known as seafloor spreading. As the plates split apart and form fissures, molten material from the mantle melts and quickly rises upward to fill in the space.
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