Volcanoes produce extrusive igneous rock.
Extrusive igneous rock such as basalt, rhyolite, pumice, and obsidian.
The material that erupts from a volcano is called lava. It consists of molten rock that flows out during an eruption.
When a volcano erupts the molten cools quickly it is also known as volcano glass
When a volcano erupts, the lava that cools and solidifies forms igneous rock. Depending on the cooling process, it can be classified as either extrusive igneous rock, such as basalt, which cools quickly on the surface, or intrusive igneous rock, like granite, which cools slowly beneath the surface. The mineral composition and texture of the rock are influenced by the chemical makeup of the lava and the cooling rate.
That depends on the chemistry of magma the volcano erupts - Basalt, andesite, rhyolite etc. but Generically the rock coming out of a volcano is called lava rock (pahoehoe or aa) but one can also get pumice or ignimbrites.
igneacious
Extrusive igneous rock.
volcano?
Extrusive igneous rock such as basalt, rhyolite, pumice, and obsidian.
lava
a shield volcano
The rock forms over a cooling process.
Any kind of volcano can form after the eruption. If it doesn't erupt and never has then it isn't a volcano.
The material that erupts from a volcano is called lava. It consists of molten rock that flows out during an eruption.
Lava and rock explode out of the volcano then lava pours down the volcano covering the land then turning into rock making the volcano bigger.
When a volcano erupts the molten cools quickly it is also known as volcano glass
When lava erupts from a volcano and cools down, it hardens and becomes an igneous rock