Ore deposits

Iron "deposits" both available *and* clearly marked, please? I see stone available in the world when I mine into the hillsides, but where is the iron? So far the only way I have found it is to buy it from other kingdoms or wanderers. There is copper to gather, but no iron? Although truth be told, I'd rather mine the iron from a hillside than to just find it laying about.

Same can be said for Silver and Gold, and whatever other metals come up in the future.