Jerome does get a little confused, doesn't he? I doubt there will be many animals left after the 15 cubits over the mountains flood; and then there is the earthquake that "does for" all animals - yet a couple days later Jerome has them gathering in the fields roaring.

Likewise, all stones and rocks will crack, but houses and bullding remain intact to be destroyed later? And somehow people survive to "leave their abodes" (which are now piles of dust anyway - so they really don't have any abodes to leave)