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Composite volcanoes are most commonly found where andesitic magmas are present. Occuring in chains, composite volcanoes are most notably found in the "Ring of Fire," located in the Pacific rim. Other instances of composite volcanoes include Mount Rainier (Washington state), Mount Vesuvius (Italy), Mount St. Helens (Washington State), Mount Hood (Oregon), and Mount Shasta (California).
- there are some in mid-Atlantic ridg
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What are the 4 general types of volcanoes?
shield,cindercone,composite,extinict
How are composite volcanoes and shield volcanoes different?
Composite volcanoes or Stratovolcanoes are your typical cartoon image of volcanoes, very tall, narrow craters at the top, steeper sides often snow capped peaks. Shield volcanoes tend to not be as tall and have much more shallow sloping sides. The reason for this is due to their products and location. Composite volcanoes produce lava which is much more viscous (thicker) than shield volcanoes, which tend to produce a thinner runnier lava. This is due to the Silica (SiO2) content of the lavas. Composite volcanoes tend to be produced by more Acidic lavas (with a higher Silica content) where as shield volcanoes are produced by lavas with a more Basic composition, (a lower silica content). Composite volcanoes (Mt St Helens, Vesuvius, Mt Fugi) tend to be formed near destructive plate boundries where one tectonic plate is being subducted beneath another. When the subducted plate reaches roughly 700 km depth it begins to enter the Aesthenosphere, a layer of more ductile rock deep in the mantle. The water content of the subducted plate causes the aesthenosphere to partially melt. The molten magma begins to rise in plumes towards the surface. As the magma plume rises it has a lot of contact with the surrounding rocks it passes through, and it absorbs silica from them, arriving at the surface as a viscous silica rich melt. Shield volcanoes (Mauna Loa, Kiluea, Hekla) are more common over constructive plate margins where two plates are pulling apart. When the plates pull apart it de-pressurises the mantle beneath the plates and causes it to partially melt. The Magma rises up the cracks between the two retreating plates, with little contact to the surrounding rocks, and so picks up very little silica content. This causes it to reach the surface as a runny basic lava. The runny nature of shield volcanoes means that lava flows travel a long way from the volcano crater, causing little build up on the surrounding flanks of the volcano. The viscous nature of Composite volcanoes means that the lava doesn't travel very far and builds up on the sides of the volcanoes making them much steeper. Shield volcanoes are more often active than composite volcanoes, some erupt near constantly for many decades. Composite volcanoes erupt far less often, and can be mistakenly thought of as being extint for hundreds of years between eruptions. Composite volcanoes tend to have much more explosive eruptions than shield volcanoes, which tend to be more effusive in nature. Composite volcanoes are capable of pyroclastic flows (Mt St Helens) and huge eruptions which can entirely destroy the volcano (Pinatubo, Krakatoa). Shield volcanoes tend to only erupt in lava flows, which can create enormous shallow volcanoes (Mauna Loa, Olympus Mons)
Are there volcanoes on the moon?
Not any more. There used to be (about 1 billion years ago) but not now.
Which country is known as country of earthquakes and volcanoes?
Earthquakes and volcanoes are usually found near plate boundaries.
Which two spheres of earth are the effects of volcanoes and earthquakes found?
stratosphere and hydrsphere
How Compare shield volcanoes and composite volcanoes?
Shield Volcanoes - Wide base found at constructive plate margins Composite Volcanoes - Steeper Sides found at Destructive (subduction) margins
Where are composite volcanoes usually found-?
in the north pole during the winter months.
What are 3 kind of volcanoes?
There are 3 kinds of volcanoes which are found around the world. They are shield volcanoes, cinder cone volcanoes, and composite volcanoes. Many of the most beautiful mountains in the world are composite volcanoes.
What kind of volcanoes are found on io?
answer: composite volcano's
Compare and contrast composite and shield volcanos?
Shield Volcanoes - Wide base found at constructive plate margins Composite Volcanoes - Steeper Sides found at Destructive (subduction) margins
A composite volcano is most likely to form where?
Composite volcanoes most often form near subduction zones.
What are three types of volcanoes?
Three types of volcanoes are Cinder Cone Volcanoes, Shield Volcanoes and Composite Volcanoes.
What 2 types of volcanoes are there?
There are three. From smallest to largest, they are: Cinder Cones, Composite Volcanoes (also called Strata Volcanoes), and then Shield Volcanoes.
What are the colors of composite volcanoes?
The colors of composite volcanoes are brown dark brown etc
Where can composite volcanoes be found?
there mostly found at earths plates come together and one plate sinks beneath the other
What is the consistency of lava in the composite volcanoes?
Composite volcanoes are found on destructive plate margins , where the oceanic crust sinks beneath the continental crust. Composite volcanoes have the following characteristics: Acidic lava, which is very viscous (sticky). Steep sides as the lava doesn't flow very far before it solidifies
Are composite volcanoes the biggest volcanoes?
yes
