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volcanoes appear when two plate boundaries either move away from each other or move closer to each other. New land is made by lava solidifing in gaps in the earth. Under the sea, plates always move and lava keeps solidifing so every year, the volcano grows a couple of centimetres until it reaches the top of the sea where it starts to form new land until the lava in the magma chamber underneath the sea starts to build up pressure which sends up the lava which will set the volcano off.
some volcanoes that are on land errupt when too much pressure has been built up over hundreds of years, the top of the volcano blows off and then large clups of molten rock and ash fall from the volcano. The lava over flows and runs down the side of the volcano.
There are different types of volcanoes:
* a lava volcano is runny and spreads faster over a larger area
* an ash volcano is formed from ash and is usually steep sided. They have a large crater.
* A larger lava volcano has thick slow flowing lava that hardens quickly and forms steep sided volcanoes.
A volcano may also appear in `hotspots` this is where there is particuly hot lava under the surface toward the middle of the plate and the lava pushes up through the plate causing a volcano
Hope this helps
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoOne way a volcano forms was when there was a weakness in the ground and lava from below the earth's crust melts outwards. It's called a hot spot.
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Where do most volcanoes appear on the earth surfaces?
Where ever there are hotspots
Do volcanoes erupt in warm countries only?
No. Where volcanoes appear is not affected by climate. There are volcanoes in places such as Iceland, Alaska, and Antarctica.
What percentage of volcanoes appear on continental crust?
76%
Where do volcanoes appear on the earths crust?
Volcanoes ussualy appear near rift zones. They are mostly on tectonic plate boundaries, like the ring of fire. This is not EVERY volcano though.
Does Mediterranean climate have volcanoes?
Climates do not affect where volcanoes appear. However, there are Mediterranean volcanoes, in fact, the most active volcanoes in Europe are situated in the Mediterranean.
How does Mars have volcanoes and ice on it?
In the same way that the Earth has volcanoes and ice. However, Martian volcanoes do not appear to be active.
Where do most volcanoes appear on the earth surfaces?
Where ever there are hotspots
Do volcanoes erupt in warm countries only?
No. Where volcanoes appear is not affected by climate. There are volcanoes in places such as Iceland, Alaska, and Antarctica.
What percentage of volcanoes appear on continental crust?
76%
Where do volcanoes appear on the earths crust?
Volcanoes ussualy appear near rift zones. They are mostly on tectonic plate boundaries, like the ring of fire. This is not EVERY volcano though.
Does Mediterranean climate have volcanoes?
Climates do not affect where volcanoes appear. However, there are Mediterranean volcanoes, in fact, the most active volcanoes in Europe are situated in the Mediterranean.
Were do volcanoes appear the most?
Where the Earth's tectonic plates lie.
What is the name of the layer of earth where volcanoes form?
Volcanoes appear only on the crust, but are caused by processes taking place in the mantle.
Are there volcanoes on Antarctica?
yes one of the most popular volcano on Antarctic is mount Erebus
Which two geological processes appear to have been most important in shaping the present surface of Venus?
volcanoes and tectonics
Where do volcanos happen?
Most volcanoes appear at the tectonic plate boundaries where friction between the plates and the mantle makes magma which then push through near the plate boundaries forming volcanoes.
Where do volcanoes that are far from the margins of the tectonic plates appear?
These volcanoes are believed to be above local 'hot spots' on the surface. Hawaii would be the prime example. Most volcanoes occur above the subduction zones at a merging plate boundary. But volcanoes also appear directly at the expanding junction of a pair of plates. Iceland, and some of the South Atlantic islands are examples of this.
