Glacial Lakes/Glaciers

I think it would be really cool if there were some small glacial lakes located in the new mountains biome. Similar to how surface lakes spawn in the game today, but slightly larger and covered with ice. I noticed exploring the new mountains that there were several depressions where, in the real world, ice would congregate and form an ice pack or a lake (if it gets warm enough in the summer). If something like this could be implemented in the game that would we awesome, imagine building a lakeside cabin there!