You're more likely to come across their angry cousins, known as stratovolcanoes.

你更有可能遇到他们愤怒的表亲， 被称为成层。

At only half the size of Mount Everest, it was once a 4,000 meter tall stratovolcano which melted down to a 1109 meter deep caldera.

它只有珠峰的一半大小，曾是 4000 米高的成层融成 1109 米深的破口。

It lays this material over the scaffold, which is covered in charged proteins that attract and guide the calcium carbonate molecules into layers.

它将这种材料放在支架，支架着带电的蛋白质，可以吸引和引导碳酸钙分子成层。

Magma rich in silica is more viscous and can trap gases, leading to explosive eruptions, as seen in stratovolcanoes like Mount St. Helens.

富含二氧硅的岩浆更加粘稠，可以捕获气体，导致爆炸性喷发，如圣海伦斯等成层中所见。