A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that
allows hot lava .... Some volcanoes have rugged peaks formed by lava domes
rather than a summit crater while other...
When a large body of magma has formed, it rises thorugh the denser rock layers
toward Earth's surface. Magma that has reached the surface is called lava.
www.ask.com/youtube?q=How Are Volcanoes Formed&v=6Z4as_imJfM
Jun 22, 2011 ... How Volcanoes Form ... Volcanoes, Their Formation, Impact, & Eruption -
Interesting & Educational ... Volcano Video Hawaii 7,777,646 views.
Volcanoes are formed when magma from within the Earth's upper mantle works
its way to the surface. At the surface, it erupts to form lava flows and ash deposits
Apr 29, 2016 ... Volcanoes form when hot material from below risesand leaks into the crust. This
hot material, called magma, comes either from a melt of ...
Volcanic islands form over hot spots, which occur when tectonic plate movement
allows magma from the Earth's core to erupt. As the volcano continues to erupt ...
Volcanic activity frequently occurs at the boundaries of the Earth's tectonic plates
... a significant role in the type of volcano formed, which influences its shape.
Volcanoes form when magma reaches the Earth's surface, causing eruptions of
lava and ash. They occur at ... A volcano is formed by eruptions of lava and ash.
How are Mountains formed? ... A volcano is a landform (usually a mountain)
where molten rock erupts through ... How many volcanoes are there in the world?
A volcano forms when a vent in the Earth's crust allows magma to well up from
below. ... How is a volcano formed? ... What causes a volcano to form? How does