Types of Volcanoes (copy)

Shield Volcano

a broad volcano with relatively gentle slopes

Cinder Cone Volcano

A steep-sided volcano

How are Lava domes formed?

formed during outpourings of viscous lava being erupted effusively which hardens on steep slopes.

Composite Volcanoes

made up of successive layers of lava and ash

Crater

A bowl or funnel shaped depression that usually lies directly above the vent from which volcanic material is ejected

Example of a shield volcano

E.g. Mauna Loa in Hawaii

How are sheild volcanoes form?

formed from basaltic lava and lava flows from a central vent

Are shield volcanoes effusive or explosive?

Effusive (not explosive)

How are Cinder-cone volcanoes formed?

formed by explosive eruptions of ash, lava fragments, dust (pyroclasts)

Example of a Cinder-cone volcano?

E.g Paricutin in Mexico

Example of a lava dome?

E.g. The Pitons Mountains in St. Lucia

Features of a cinder cone volcanoe?

has conelets or parasitic cones due to magma finding alternative paths the surface when main vent is blocked

Examples of a cinder-cone volcano

E.g La Soufrière in St. Vincent