No. Volcanoes also release ash and a variety of gasses.
When lava spews out of it.
Fissures usually erupt basaltic lava.
volcanoes will erupt and let out lava then the lava will harden and that will be new land.
When Volcanoes erupt the surface is melted by the lava
Nobody knows because volcanoes just erupt when the lava builds up and is forced up the main vent and out of the crater!
Volcanoes can erupt ash, gas, and pumice in addition to or instead of lava.
This is because of the time of volcano it is and the type of lava it excretes. A steep volcano will erupt with basaltic lava which is runny and can clog at the top. A shield volcano, however is different as the thick lava emitted just glops onward.
They are not volcanoes. There is neither lava nor pressure beneath them, they are just massive mounds of dirt and rock.
by pressure of molten lava of the dence viscocity.
Composite volcanoes can erupt both mafic and felsic material, but intermediate material is the most common.
Did you know that composite volcanoes make up 60% of the Earths volcanoes. Composite volcanoes don't always have to erupt from the top. They can have many magma chambers and can erupt from the sides. They can be made of basalt, rhyolite and/or andesite. They erupt both ash and lava. The lava is very thick. When the time comes for the volcano to erupt they start to become very quiet. (Sneaky eh?)
Similar but not the same, volcanoes erupt from magma and lava and rocks come out but not in a mountain