They have been created during the formation of the earth millions and even billions of years ago. Earthquakes and tectonic plate shifts may help form volcanoes, and may even erupt them.
Volcanoes are usually cone shaped mountains or hills.
Volcanoes are cone-shaped mountains that can eject lava, ash, and gases from a vent in the Earth's crust. They are formed by the accumulation of erupted material over time.
The main kinds of volcanoes according to shape are shield volcanoes, which have a low, broad profile; stratovolcanoes (or composite volcanoes), which are tall and conical with steep slopes; cinder cone volcanoes, which are small, steep-sided cones made of pyroclastic material; and calderas, which are large, basin-shaped volcanic depressions usually formed by the collapse of a magma chamber.
Cinder cone volcanoes form from the accumulation of cinders and tephra during an explosive volcanic eruption. This material is ejected from the volcano and falls around the vent, building up a cone-shaped structure. Examples of cinder cone volcanoes include Paricutin in Mexico and Sunset Crater in Arizona.
cinder cone volcanoes: consist of primarily erupted volcanic ash and rock fragments, or cinders. When the volcano erupts the ash and rock are ejected onto the mountain. As this process continues the volcano "grows" higher because of the debris build up.
Volcanoes are cone shaped.
Composite Volcanoes!
Volcanoes are usually cone shaped mountains or hills.
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Composite Volcanoes!
They are shield volcanoes. This means that they are cone shaped but with very shallow slope angles forming the volcanoes flank.
Volcanoes are cone-shaped mountains that can eject lava, ash, and gases from a vent in the Earth's crust. They are formed by the accumulation of erupted material over time.
The main kinds of volcanoes according to shape are shield volcanoes, which have a low, broad profile; stratovolcanoes (or composite volcanoes), which are tall and conical with steep slopes; cinder cone volcanoes, which are small, steep-sided cones made of pyroclastic material; and calderas, which are large, basin-shaped volcanic depressions usually formed by the collapse of a magma chamber.
Three landforms that can be created from ash are cinder cone volcanoes, composite volcanoes, and shield volcanoes. Lava plateaus can also be formed.
Cinder Cone
Erebus is shaped like most volcanoes -- like an upside-down cone.
Lava is spewed out of a vent like a cannonball, forming a cone-shaped volcano.