The best thing about creating a modpack. : r/feedthebeast
Analysis: Ore and stone distributions in 1.17. Copper ore is most common at Y=47, amethyst blocks between y=16 and Y=48, deepslate and tuff below Y=16. Details in comments : r/Minecraft
Blizz - Thermal Foundation - Team CoFH
Risks of mining to salmonid-bearing watersheds | Science Advances