Copper deposits form in black smokers because:
A)seawater is heated by hot rocks and rises to the seafloor
B)a change in Earth's atmosphere caused copper to be deposited by groundwater
C)large magma chambers have crystal settling that concentrates the copper
D)weathering leaches the top of the deposits and concentrates the copper downward

Question

Copper deposits form in black smokers because: 
A)seawater is heated by hot rocks and rises to the seafloor 
B)a change in Earth's atmosphere caused copper to be deposited by groundwater 
C)large magma chambers have crystal settling that concentrates the copper 
D)weathering leaches the top of the deposits and concentrates the copper downward

Quizplus · Accepted Answer

Copper deposits form in black smokers due to hydrothermal activity. Seawater is heated by hot rocks and rises to the seafloor, where it comes into contact with minerals and metals. As the water cools, the minerals and metals precipitate out and form deposits, including copper deposits.

Copper Deposits Form in Black Smokers Because