Iron ore distribution

[WormPL87]

I've prospected area in 20x20 minimaps for level 4 and I haven't found Iron Ochre, (not even Heavy Earth on both lv3 and lv4) while I found almost every other ore type. Am I unlucky, are the ore clusters this massive and I need to prospect further, or are pure-iron nodes now exclusive to some geographical area?

[waga]

I have a theory , for a few years now it's regionalised. You wont find any for several minimaps but when you finally find a decent sized vein you'II find some more everywhere in the area.
I might be tripping but I'm reinforced in this idea every worlds.
And I didnt mean exclusiveIy to iron ochre but every ores.

That and the single ore tiles are frustrating as fuck.

[Fostik]

It is regional.

I also spent weeks and couple hundreds of bars for supports on my L4 for nothing.
On L5 then, my 3rd natural mine support were large iron ochre spot.
Do not block your development by it and burn out from game because devs poorly considered decision, buy it, for example here viewtopic.php?f=87&t=77025