can multiple ores occupy a single single tile?

[adamwong246]

I've created an ore "earth" which is infinitely mine-able and covers everything, even other ore patches. But it seems that this means that you can't mix ores. If I place a miner over an iron patch, the miner only ever mines the top layer of earth and never mines the iron patch "beneath". But I want to get a mix of earth and stone. I think I can alter my code so that earth resources only spawn atop empty tiles but I want to confirm that this is the expected behavior?