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Volcano Facts and Types of Volcanoes - Live Science: Scientific News, Articles and Current Events
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日期:2024-09-29
A volcano is a vent or fissure in Earth's crust through which lava, ash, rock and gases erupt. A volcano is also a mountain formed by the accumulation of these eruptive products. Let's take a look at how volcanoes form: Earth's crust is 40 to 250 miles (6...看更多