Here's how:

* Glacial Erosion: Fiords are formed by the erosive power of glaciers. As glaciers move across the land, they carve out deep, narrow valleys.

* Sea Level Rise: After the glaciers retreat, the valleys become flooded by rising sea levels, creating the characteristic deep, narrow inlets that we know as fiords.

So, while deposition plays a role in shaping the landscape around fiords, the primary force behind their creation is the powerful erosion of glaciers.