Volcanic eruptions occur when molten rock (magma) rises to the surface of the Earth's crust, typically along the boundaries of tectonic plates.

Composite volcanoes, also known as stratovolcanoes, are known for their steep-sided cone shape and frequent, explosive eruptions due to the accumulation of alternating layers of lava and ash.

A caldera is a large, basin-shaped depression formed when the roof of a magma chamber collapses after a volcanic eruption.

Hawaiian eruptions are characterized by the emission of large volumes of low-viscosity lava, creating broad, gently sloping shield volcanoes.

Fumaroles are vents or openings in the Earth's crust that release volcanic gases and vapors, often accompanied by sulfurous odors.

Strombolian eruptions are characterized by the ejection of incandescent fragments of lava, known as scoria, which are typically less than 2 meters in diameter.

Obsidian is a volcanic rock formed from the rapid cooling of lava on the Earth's surface, resulting in a glassy texture and sharp edges.

Vulcanian eruptions are characterized by the emission of large, blocky fragments of lava, known as bombs, which are typically more than 2 meters in diameter.

Tephra cones are volcanic landforms formed by the accumulation of volcanic ash and other pyroclastic material, typically around a central vent.

Pelean eruptions are characterized by the emission of a mixture of ash, gas, and rock fragments, forming a dense cloud known as a pyroclastic flow.

Granite is a volcanic rock formed from the slow cooling of magma beneath the Earth's surface, resulting in a coarse-grained texture and a variety of mineral compositions.

Plinian eruptions are characterized by the emission of large volumes of ash, forming a dark cloud that blocks sunlight and can reach high altitudes.

Shield volcanoes are volcanic landforms formed by the accumulation of lava flows, typically resulting in broad, gently sloping structures.

Surtseyan eruptions are characterized by the emission of a mixture of lava, ash, and gas, often occurring when lava interacts with water, such as in submarine or coastal environments.

Cinder cones are volcanic landforms formed by the accumulation of volcanic bombs and other large fragments of lava, typically around a central vent.