It is just a pre-historic chicken coop.
Unless, another shipmate comes forward who was on that 1974 mission, the Petty Officer's claim will go down as just another story that vehemently disputed by Naval Intelligence. Noah's 'Bible-Worldwide-Flood' Ark?
This whole issue will end up with JFK in the 'Geologic-Column' of the 'Fossil Record'.
Room '101' archives.
/sarcasm