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Volcano's form at boundaries between two tectonic plates. Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface it erupts to form lava flows and ash deposits. Ash deposits result from more explosive activity and lava flows usually are associated with quieter activity. Anyway, once you have piled up lava and/or ash around the vent, you have a young volcano. After many many more eruptions you have a big volcano that is constructed of the ash and lava products of these eruptions.

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βˆ™ 15y ago
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βˆ™ 5mo ago

Volcanoes form when magma from within the Earth's mantle rises to the surface. This can happen due to tectonic plate movements, hotspot activity, or volcanic systems along mid-ocean ridges. As the magma reaches the surface, it erupts as lava, ash, and gases, building up to create a volcanic structure.

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βˆ™ 14y ago

Heat, stress, and pressure from earths interior.

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βˆ™ 4y ago

heat stress and pressure

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Q: What causes volcanes to form?
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