Basic lava, which is non-acidic and very runny. Gentle sides as the lava flows for long distances before it solidifies. No layers, as the volcano just consists of lava. Less violent eruptions. Shorter periods between eruptions.
Why do the volcanoes release lava?
Deep within the Earth it is so hot that some rocks slowly melt and become a thick flowing substance called magma. Since it is lighter than the solid rock around it, magma rises and collects in magma chambers. … Magma that has erupted is called lava. Some volcanic eruptions are explosive and others are not.
When lava is expelled from a volcano?
Another cause is when volcanic material expelled during an eruption immediately begins moving down the sides of the volcano. Pyroclastic flows can also form when a lava dome or lava flow becomes too steep and collapses. Pyroclastic flows often occur in two parts. Along the ground, lava and pieces of rock flow downhill.