D9冰岛🇮🇸｜Fagradalsfjall （3）

因为向导Oddi是地质学家，沿路一直讲解，大概记录如下。

为何冰岛多火山：Because it lies on the Mid-
Atlantic Ridge, where 2 tectonic plates are moving apart. As the plates separate, magma rises from the mantle and creates crust

喷发原理：When pressure builds beneath the surface, magma is forced upward through cracks in the crust. If the pressure is strong, an eruption occurs, releasing lava, ash, and gases

熔岩冷却：As lava flows across the landscape, it gradually cools and solidifies, forming new rock.
Some lava becomes smooth, while other lava forms rough and jagged surfaces

苔原踩上去真的好松软，感觉在踩棉花～

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