Documentation on Iron Ore, Amanite, etc.?

[Garem]

There is some stuff you can now get in the Underdark (no idea how long it's been that way, but IRC seemed utterly puzzled)... but you acquire it in a new and slightly weird way - attacking it. Iron Ore is the most easily recognizable.

There's not much documentation on this - what are these things? Are they just a new way to get items of general use, or for something specific?

How exactly are these resources retrieved - what skill checks, etc?

I've figured out one - farming - and that should probably be reflected on the EFUSS page. Most of the unknowns about these things are mechanical, not in-game discoveries, so having more clear information about that would be nice.

[Howlando]

They're for monster lairs, and maybe other things later.

Mining is [Mining + Discipline/2 + Appraise/2] vs. DC

Fungus is [Farming + Search/2 + Spot/2] vs. DC.

The system is probably going to be tweaked which is why it hasn't been documented yet.

[xXCrystal_Rose]

Since this hasn't been officially documented yet is it safe to assume this is still how the system is calculated?