Each volcanic eruption is unique due to the different kinds of magma that feed into volcanoes. Mafic magmas are low in silica and contain darker, mafic minerals; felsic magmas are high in silica and contain lighter colored minerals.
The higher the amount of silica in magma, the higher its viscosity. Viscous magma doesn’t flow easily to the surface and will usually form igneous intrusive rocks instead. Magma collects in magma chambers in the crust at 160 km below the surface.
Here are some landforms that form from eruptions:
Hot springs are formed when water heated below ground rises through cracks in the ground. Geysers are also formed when water heated below ground comes up to the surface, but they are created through eruptions rather than bubbling. Only a few places on Earth have the right conditions for geyser formation.