1. Steep-sided cone shape: Stratovolcanoes are characterized by their steep-sided, conical shape, which is formed by the layering of lava flows, ash, and other volcanic materials.
2. Composite structure: Stratovolcanoes are composed of alternating layers of hardened lava, ash, and pyroclastic material. This layering gives them their characteristic appearance.
3. Explosive eruptions: Stratovolcanoes are known for their explosive eruptions due to the high viscosity of the magma they produce. These eruptions can result in pyroclastic flows, ash clouds, and volcanic bombs being ejected from the volcano.
4. Andesitic to rhyolitic magma: Most stratovolcanoes are formed by andesitic to rhyolitic magma, which has a higher silica content compared to other types of volcanoes. This high silica content contributes to the explosive nature of stratovolcano eruptions.
5. Volcanic hazards: Stratovolcanoes are associated with various volcanic hazards, including ashfall, pyroclastic flows, lahars (mudflows), and volcanic gases. These hazards can pose risks to nearby communities and ecosystems.
Which of these are features of most stratovolcanoes?(1 point)
1 answer