Large copper deposits, called porphyry copper deposits, form because:
A) copper accumulates within and near intrusions that have a porphyritic texture
B) seawater is heated and rises to the surface, forming black smokers
C) a change in Earth's atmosphere caused copper to be deposited by groundwater
D) deep groundwater, rich in lead and zinc, encounters buried hills of granite

Question

Large copper deposits, called porphyry copper deposits, form because: 
A) copper accumulates within and near intrusions that have a porphyritic texture 
B) seawater is heated and rises to the surface, forming black smokers 
C) a change in Earth's atmosphere caused copper to be deposited by groundwater 
D) deep groundwater, rich in lead and zinc, encounters buried hills of granite

Quizplus · Accepted Answer

The Answer of Large copper deposits, called porphyry copper deposits, form because: 
A) copper accumulates within and near intrusions that have a porphyritic texture 
B) seawater is heated and rises to the surface, forming black smokers 
C) a change in Earth's atmosphere caused copper to be deposited by groundwater 
D) deep groundwater, rich in lead and zinc, encounters buried hills of granite

Large Copper Deposits, Called Porphyry Copper Deposits, Form Because