Idea of Iceberg Icon
There is a wavy line in the middle of this object. Part of the object is above the wavy line and looks like triangular mountains. The other part is below it and looks like a square with a small square cut out of the bottom of it.
This page contains the Iceberg vector icon, as well as variations of this icon in different visual styles, and related icons. All icons are in the flat vector style, however, differ by the line thickness, fill, and corner radius.