How can contact metamorphism result in the deposition of ore deposits?
A) Magma differentiates during cooling, leaving the ores to settle out to the bottom of
the magma chamber.
B) Hot, mineral-rich water exits the seafloor, resulting in instant precipitation of
minerals.
C) Hot magma burns the country rock, which experiences a mineral phase change.
D) Hot fluids in contact with the country rock can result in chemical reactions that
facilitate the migration of metallic ions.
What property of the crust allowed it to form as the exterior of Earth?
A) Magma at the surface cooled and crystallized before anything in the interior.
B) Materials that make up the crust are less dense and rose to the top.
C) Churning and upheaval in the interior thrust crustal rocks toward the surface.
D) Meteorites impacting Earth deposited this material at the surface.