spanish galleons

Found this piece scuba diving the cape fear river a few months back. I was told it was a type of amphora used by the Spanish as olive jars and wine vessels during their expedition to the Americas. I believe that this is what they are but I haven't heard of any being found off the atlantic ocean...

Dear Friends of the Treasures and the Sea Friends and for those of you who don't know me, I research treasure sites and information, which in turn I share to help in your quests. While I used to land hunt and have a special fondness for the 1715 Fleet, I can no longer do that as an injury...