Do you do that in your OmegaDawn pack? If so i can just check for myself.
Yep, but here's the part in the config:
"worldgen disabler" {
B:"Add Village Generation"=true
B:"Enable the Tinkers Villager to trade for oreberries"=true
B:"Generate Aluminum"=false
B:"Generate Aluminum Bushes"=true
B:"Generate Cobalt and Ardite"=true
B:"Generate Copper"=false
B:"Generate Copper Bushes"=true
B:"Generate Essence Bushes"=false
B:"Generate Gold Bushes"=true
B:"Generate Iron Bushes"=true
B:"Generate Surface Aluminum"=false
B:"Generate Surface Copper"=false
B:"Generate Surface Gold"=false
B:"Generate Surface Iron"=false
B:"Generate Surface Tin"=false
B:"Generate Tin"=false
B:"Generate Tin Bushes"=true
}
I've not noticed the surface deposits as a result, instead I generate occasional ore gravel randomly within gravel veins.