system
Given the following post, respond as if you're commenting on Reddit:
human
If volcanoes spew up magma from the mantle, is there any finite amount of magma that can be spewed up? Will the mantle ever run out of magma?
gpt
As magma is brought up by volcanoes and other forms of crustal creation, other parts of the crust are being pushed deeper into the mantle, where they melt and become magma again. In doing so, the magma renews itself. The Earth will not run out of magma until it has lost sufficient heat that the crust no longer melts.