Evolution Intelligent Design Paleontology

How did a mammoth tusk from well over 100,000 years ago end up deep in the ocean?

Whatever happened, the find shows that a fully terrestrial mammal can get buried in ocean sediment. So, he asks, what about some of the papers that show apparent transitional terrestrial whale fossils that are buried in deeper sea conditions? How do we know that some of these fossils had anything to do with the ocean. No doubt the ocean holds more secrets.