That's what I'd thought and how my shallow water theory started. You have different drops as the ship is breaking apart, dumped loads from deeper moving in toward shore. Then later the hurricanes come along to redistribute the wealth.They found gold last summer on the same site 15 feet is actually the deep part of that wreck.
It's not a shipwreck like most people think of one.. there is not some big old boat laying on the bottom... these things were destroyed in a hurricane 300 years ago in shallow water and rocky reef ledges