The flOre is lava. Dig yOre way out through this divOrese and dangOreus field! Will you Coke on the limited space and submit to the cOreruption Ore will you transfOrem it into an majestic Orechestra? Also known as "Dangerous" or "Danger Ores".
That's the Perlin Noise function. I think that setting is on NewGame->ModSettings (button)->MapSettings (tab) -> ~generationMode is set to 2. I think that you want it set to 1.
1 is the crazy random mix, 2 is the generation with perlin noise.