Writing Resources
Lava domes form when magma rises which is semi molten rock from the crust lithosphere and the asthenosphere It usually occurs after an eruption from the volcano but the eruption must not be an explosion After the magma flows out through the volcano pipe it slows down due to its density and the lava cools on top of the vent of the volcano When it cools on top it produces a bump of hardened rock on top of the vent or caldera which is a bowl like depression in the chamber of a volcano When the lava reaches the surface its consistency is very dense and sticky Its consistency is between a solid and a liquid Since the lava is dense it does not flow down the volcano like a normal eruption The lava stays around the vent as it blocks new lava from coming out If the new lava is persistent enough then the new lava pushing the hardened layer will create cracks and broken debris A mound pops up atop of its surroundings In normal eruptions the lava breaks through the surface but a lava dome forms when the magma slowly rises from under the ground causing a build up of a mound shaped dome Magma bursts out because of pressure and density build up from the mantle It is just a way of the Earth releasing tension and heat
