What is the difference between the coal that formed in what is now the eastern US vs. the western US? Why is this important to know?

This image shows a volcanic eruption in hawaii with lava flowing into the sea. which statements best describe this eruption? check all that apply. its magma is high in silica. its magma has low viscosity. its lava came from a quiet eruption. its lava sets fire to everything in its path. its lava came from an explosive eruption.