[2021] Biomes and ores..

Warm Forest, Cold Forest, Taiga and Ice biomes can contain copper.

Originally posted by Johnsen: The "Below the surface", is it from the point i break ground with shovel/minepick, or is it from the bottom up? the cord 0 and up ?

From the highest natural block, e.g. from where you break ground.

Originally posted by Johnsen: well according to map its all half n half of 1 type of forest, and desert.. No biomes showing.

I see on slg github its been occuring since 0.8 in 2019

Any fix?

Then you are using a extremely outdated EcoSim.eco config file back from 2018. Otherwise that issue cannot happen.

Yep, that's what I was referring to.