Simply declare the flood, plate tectonics and associated phenomena a miracle and be done with it.
But that would be giving up on having it taught in U.S. public school science classes, or otherwise getting it accepted as scientific. There are people who, for whatever reason, want the imprimatur of science on their religious beliefs.
Another example is my biology textbook from last year (haha ontogeny recapitulates phylogeny? my biology teacher even still believed that garbage).
Would you please post the title, author, publisher, and date of publication of that textbook? If there are indeed such errors in it, they will be corrected.
The main problem I have with that is there doesn't seem to be any observable change in species in the fossil record. Is there some that I have overlooked?