I find a lot of this discussion very fascinating. Two things jump out at me from a theological point of view, and then from more of science point of view.
First the theological: Any God who can stop the rotation of the earth without destroying the earth, could also bring up steam and water from the mantle without destroying the earth. That however, is probably not anything science could really deal with. The excuse of: Well He's God and can do what He wants... while it certainly could be true if God exists, is not really a scientific answer. Nevertheless, if God exists as the Bible portrays Him, then He is absolutely capable of defying physical laws as we understand them.
Second science: We have a lot to learn as of yet about the mantle, crust, water, forces, etc... Maybe if some of these drilling projects can break through the crust, or as scientists determine how water formed below the earth's surface, or could rise above it, we'll know a lot more. Until then, it sure is interesting to read I must admit. And I personally believe there is room for Christians, atheists, agnostics, et al in this field of study.