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[mathzip]

Hey,
I know i m supposed to look for iron ore in sedimentary layers bla bla bla... but i have never found any on any map without setting the mineral frequency to frequent.
I always take embark spots with lots of shallow and deep metals but only find tetrahedrite...
Am i not looking enough ?
Is frequent to find iron ore on the maps ?
Have i been just amazingly unlucky ?

[zelpao]

Sedimentary soil is hard to find.  IIRC, if you look for flux stone on embark, you may have a slightly larger chance to find one (make sure it shows pre-embark).  Also, don't use deep metals for finding iron.  The only way you'd find iron deep in the ground is from hematite, which also is found in sedimentary soils.  You should be looking for shallow metals with flux stone.

[Garath]

deep metals are usually gold, tetrahedrite or some of the 'misc' ones.

Places with deeper soil seem to offer better chances for sedimentary layers. Fiddling with the volcanism settings in world gen to decrease the percentage of high volcanism locations seems to help

[Faeryx]

I'm having a similar problem, but at my sight all I have found so far is tetrahedrite, galena, native gold, and malachite. I haven't really explored much underground, but is there a good chance that I will be able to find any of the ores of iron?

[Garath]

I think it was mentioned earlier that iron ore is most common near the surface (shallow metals) and very rare deeper down.

[Z1000000m]

DfHack, prospect at embark, is all you need to know.
That being said, I still agree that this deep/shallow metal system is just not usefull at all.

[Quietust]

I think it was mentioned earlier that iron ore is most common near the surface (shallow metals) and very rare deeper down.

"Rare" is an understatement - it is impossible to find iron ore beneath the topmost stone layer, since the only layers that can contain iron ore (sedimentary and igneous extrusive) only appear at the surface.

[Garath]

I've had some marble layers quite deep with hematite

[NecroRebel]

I've had some marble layers quite deep with hematite

Then you've modded. Hematite normally doesn't occur in any layers except igneous extrusives and sedimentaries. Limonite and magnetite occur are both found only in sedimentary layers. Marble cannot have any iron ore without something having been modded.