So I'm having a lot of trouble finding flux stone on this embark. I could have sworn it was listed in the embark info, but maybe I'm just crazy.
I have a lot of magnetite, and I'd love to get some steel for my soldiers, but having no flux is preventing that. I've done some exploratory mining hoping to find some flux stone, but so far haven't turned up any.
I've tried reading the wiki, but it's not being a lot of help here. The magnetite I have is all embedded in layers of shale, and below the shale is gabbro. I've dug down quite deep, eventually breaching two cavern layers, looking for some sort of flux stone, but so far no dice.
The wiki claims that marble "forms entire layers". Does that mean that it takes up entire z-levels, or that it just occurs in large slabs and not just veins? In other words, should I keep digging around on the z-levels of shale looking for marble (or some other flux stone)? Would it do me any good to keep digging down, or do sedimentary layers only form at high z-levels?
Similarly, what about bituminous coal? According to the wiki, coal occurs in sedimentary layers, but I haven't seen any on this embark. Presumably it could occur in the shale layers too, right? Guessing I just got unlucky and don't have any coal on the map, which is at least acceptable since I do have plenty of trees for charcoal.
And in the end, if I did just imagine the flux on embark screen and there is none, are iron weapons and armor that much worse than steel?