Shield Volcano

                Repeated lava flows during quiet eruptions build up a broad, gently sloping volcanic mountain .

 

Cinder Cone Volcano

                When cinders erupt explosively from a volcanic vent, they pile up around the vent, forming a cone-shaped hill .

 

Composite Volcano

                Layers of lava alternate with layers of ash, cinders, and bombs due to both quiet and explosive eruptions.

 

Lava Plateau

A lava plateau is a flat, wide surface (plateau) that is formed when lava comes out of the ground and spreads out very quickly. The lava layers form a lava plateau. With each eruption and flow of lava, the plateau grows in size.

 

Caldera

a cauldron-like volcanic feature usually formed by the collapse of land following a volcanic eruption.

 

Volcanic Neck

Formed when magma hardens in the pipe and eventually is exposed due to erosion of the volcano.

 

Dike

A near-vertical slab of volcanic rock formed when magma forces itself across rock layers.

 

Sill

A horizontal slab of volcanic rock formed when magma forces itself across rock layers.

 

Batholith

Mass of rock formed when a large body of magma cools inside the crust

 

Dome Mountains

Form when rising magma is blocked by horizontal  layers of rock.  The magma forces the layers of rock to bend upward into a dome shape. Eventually, the rock around the bulges erode.