In the lore of the world I'm building, the Dwarves used to have a very large territory surrounded by more or less impassable mountain ranges. This territory shrunk significantly when the elves got four dragons (the only dragons in existence and the only dragons to have ever been seen) and quite simply burned down enough of the mountains to force the Dwarves out of a lot of their land.
My questions are as follows:
- Is this feasible to have happened? I know the melting point of igneous rocks is about 1200°C. Do you think four dragons could achieve that heat?
- How long would they have to use their fire to burn down significant passages into the mountains?
- What would the burned parts of the mountains look like now that they've been melted down and had time to cool?
Since @NeilSlater pointed out that to properly answer this question I need to better define how dragons in my world work, I present you with the following:
- I suppose I mostly want to know what it would take to make this feasible, as opposed to if it is feasible. What temperatures for how long would be needed to achieve this?
- Keep in mind that the entire mountain doesn't necessarily need to be melted down, just enough to bring it from impassable to passable. This way the Elves can plan future raids on the Dwarves.
- I'm more than fine with assuming that the mountains are tunnelled out for the purposes of this. (thanks @DaaaahWhoosh)