The steeper the mountains, the faster ice flows, and the quicker it carves the underlying rock.

山越陡峭，冰移动的速度就越快，冰雕磨下面岩石的速度就越快。

If they melt far enough, they even reveal underlying rock peaks which then become the borderline.

如果它们融化得足够远，甚至会露出下面的岩石山峰，这些山峰就会成为边界。

[Narrator] But erosion came along and exposed the underlying rock layers.

- [旁白] 但是侵蚀随之而来，暴露了下面的岩层。

As the groundwater drains below the surface, it can dissolve the underlying rock.

当地下水排到地表以下时，它可以溶解下面的岩石。

We call them " hot springs." In these environments, you have hot water dissolving minerals from the underlying rocks.

我们称它们为“温泉” 。 在这些环境中，热水会溶解下方岩石中的矿物质。