How Does the Addition of Water Cause Melting

What does the texture of this rock indicate about its cooling history? The magma cooled: A)entirely at the surface B)for a while at some depth and then rose to the surface where it finished solidifying C)slowly under relatively deep conditions D)slowly in the presence of water

What does the texture of this rock indicate about its cooling history? The magma cooled: A)entirely at the surface B)for a while at some depth and then rose to the surface where it finished solidifying C)slowly under relatively deep conditions D)slowly and underwater