The molten rock that erupts from volcanoes ultimately comes from Earth's mantle, which is a very hot layer of rock. It is hot enough that some if its rock can melt and rise through the crust.
lava
The amount of lava that comes out of a volcano can vary greatly depending on the eruption type and size of the volcano. In general, volcanoes can produce anywhere from a few cubic meters to millions of cubic meters of lava during an eruption. Some eruptions, such as those from shield volcanoes, can produce lava flows that extend for tens of kilometers.
In volcanoes that have lower amounts of volcanic gases in the magma. A good example is the volcanoes in the Hawaiian islands. Volcanoes with more gases in the magma tend to erupt explosively (Mt. St. Helens, Vesuvius) and have a thicker, slower moving lava.
Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. They are: Cinder Cones: They are circular or oval cones made up of small fragments of lava from a single vent. They have been blown into the air, cooled, and fallen around the vent. Composite: They are steel-sides and composed of many layers of volcanic rocks. Mt. Rainier and Mount St. Helens are examples of this type of volcano. Shield: Shaped like a bowl or shield in the middle, they have long gentle slopes made of basaltic lava flows. The volcanoes that formed the basalt of the Columbia Plateau were shield volcanoes. Lava Volcanoes: Deep sided mound formed by lava that is too thick to flow. The lava piles up near the vent.
composite volcanoes
No, volcanoes do not need lava to be volcanoes.
NO, volcanoes make lava.
lava
volcanoes will erupt and let out lava then the lava will harden and that will be new land.
lava
no
Lava
magma lava
Lava is molten rock that flows out of a volcano.
Three landforms that can be created from ash are cinder cone volcanoes, composite volcanoes, and shield volcanoes. Lava plateaus can also be formed.
Volcanoes can erupt ash, gas, and pumice in addition to or instead of lava.
they dont; the lava comes from the mantle in the earth