The spell erupting earth says, in part:
A fountain of churned earth and stone erupts in a 20-foot cube centered on that point.
Does this mean about 20 cubic feet of material from the ground is churned up and disrupted? Or is the fountain comprised of newly created or summoned material?
RAW, the spell only deals damage to creatures and makes the terrain difficult. My player is wanting to use the spell to damage stone and dislodge a deposit of ore, arguing that the word 'erupting' means it should deal damage to the terrain as well.
If it churns up material from the ground, I can see this working; however, if the material is created by the spell, then that would explain why it doesn't explicitly damage objects/terrain.
What is the correct or intended interpretation of this aspect of the erupting earth spell?