Which volcano type is described as forming steep sided mountains and having violent eruptions?

Which volcano type is described as forming steep sided mountains and having violent eruptions?

• A. Cinder Cones
• B. Shield Volcanoes
• C. Caldera
• D. Stratovolcanoes

Answer: (A)

Stratovolcanoes, also known as composite volcanoes, are the type that form tall, steep-sided mountains and are known for explosive eruptions. They build up through alternating layers of viscous lava flows, ash, pumice, and other tephra, which create a strong, layered structure with sharp slopes. The magma they erupt is highly viscous, so gases become trapped and pressure can build up until a violent explosive release occurs. In contrast, cinder cones are smaller and made mainly of loose tephra that tumbles around the vent, giving them steep but much shorter profiles. Shield volcanoes have broad, gently sloping sides formed by low-viscosity lava that flows easily, producing effusive eruptions rather than explosions. Calderas are large depressions that form after the magma chamber empties and the summit collapses, not a specific shape with steep sides and frequent violent eruptions.

Stratovolcanoes, also known as composite volcanoes, are the type that form tall, steep-sided mountains and are known for explosive eruptions. They build up through alternating layers of viscous lava flows, ash, pumice, and other tephra, which create a strong, layered structure with sharp slopes. The magma they erupt is highly viscous, so gases become trapped and pressure can build up until a violent explosive release occurs.

In contrast, cinder cones are smaller and made mainly of loose tephra that tumbles around the vent, giving them steep but much shorter profiles. Shield volcanoes have broad, gently sloping sides formed by low-viscosity lava that flows easily, producing effusive eruptions rather than explosions. Calderas are large depressions that form after the magma chamber empties and the summit collapses, not a specific shape with steep sides and frequent violent eruptions.