Composite volcanoes Composite volcanoes are found on destructive plate margins , where the oceanic crust sinks beneath the continental crust. Composite volcanoes have the following characteristics: Acidic lava , which is very viscous sticky. Steep sides as the lava doesn't flow very far before it solidifies. Alternate layers of ash and lava. For this reason, they're also known as stratovolcanoes. Strato means layers. In this manner of collapsing and filling, calderas come and go throughout the active lifetime of a basaltic volcano.
Skip to main content. Toggle menu Go to search page. Search Field. You are here Home » Types of Volcanoes. Shield Volcanoes. Disclaimers and Policies Login. A lava tube may also form, beneath the surface of the ground, when low viscosity lava develops a hard crust through which lava flows. A caldera is a large-scale volcanic crater that could be several kilometres in diameter. It is formed either when the magma chamber is emptied and the roof collapses, or through a massive explosive volcanic eruption.
Many calderas fill with water to form large circular lakes. Types of volcano - composite and shield There are two main types of volcano - composite and shield.
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