1. contact metamorphism is caused by ___.\n- ...
1. contact metamorphism is caused by ___.\n- overlying rock\n- heat from magma\n- water pressure\n- atmospheric pressure\n\n2. regional metamorphism occurs mainly at ___.\n- divergent boundaries\n- oceanic trenches\n- convergent boundaries\n- transform boundaries
Answer
# Brief Explanations:
1. Contact metamorphism is caused by the heat from magma intruding into surrounding rocks.
2. Regional metamorphism occurs mainly at convergent boundaries where rocks are subjected to high - pressure and high - temperature conditions due to the collision of tectonic plates.
# Answer:
1. heat from magma
2. convergent boundaries