Types of Volcanoes: Typical Form & Composite Volcano Quiz

Study Notes

Types of Volcanoes

Volcanoes come in various shapes and sizes, reflecting the diverse magmas that create them. Here are some of the primary types of volcanoes, classified by their shape and behaviour:

Cinder Cone Volcanoes

Cinder cone volcanoes, also known as scoria cones, are the simplest type of volcano. These cones are formed from ash and scoria, the fragments of solidified lava that are expelled during an eruption. Cinder cone volcanoes often form quickly during a single eruptive event. They are typically relatively small, with heights ranging from tens to hundreds of meters.

Composite Volcanoes (Shield Volcanoes)

Composite volcanoes, also known as stratovolcanoes, have a complex structure. They form from alternating layers of lava, ash, and rock debris. These volcanoes can grow quite large, reaching heights of up to 5000 feet (1500 meters). Because they involve both explosive and non-explosive eruptions, they have the potential to be incredibly destructive. Examples of composite volcanoes include Mount Fuji in Japan and Mount Rainier in Washington state.

Shield Volcanoes

Shield volcanoes are the broadest and lowest-lying of all volcanoes. They form from low-silica, fluid lava flows, and thus tend to have gentle slopes and wide bases. Some famous examples of shield volcanoes are Mauna Loa and Kilauea in Hawaii. Although they can occasionally experience explosive eruptions, shield volcanoes are generally associated with extensive lava flows.

Lava Domes

Lava domes are rounded, dome-shaped features that are formed by the extrusion of highly viscous lava. Unlike most volcanoes, which are created by eruptions involving magma, lava domes are formed when solidified lava blocks get compacted together, creating a dome. They can form either within existing volcanoes or on their own, and they don't emit significant amounts of ash or gas.

In summary, volcanoes exhibit remarkable diversity, from the simple cone shapes of cinder cone volcanoes to the magnificent peaks of composite volcanoes, the expansive plains of shield volcanoes, and the unique forms of lava domes. Each type reflects the specific characteristics of the magma involved, adding to the fascinating complexity of our planet.

Description

Explore the primary types of volcanoes, including Cinder Cone Volcanoes, Composite Volcanoes, Shield Volcanoes, and Lava Domes. Learn about their unique shapes, structures, and eruption behaviors in this insightful quiz.