** [[The Mines]] (Floors 2-39)<ref name="copperfloors" /> have a high concentration of [[Mining#Copper Node|Copper Nodes]], relative to other floors. The surrounding regular rocks also have a high probability of dropping a single copper ore. | ** [[The Mines]] (Floors 2-39)<ref name="copperfloors" /> have a high concentration of [[Mining#Copper Node|Copper Nodes]], relative to other floors. The surrounding regular rocks also have a high probability of dropping a single copper ore. |