Just after I created this thread, I was asked to remove my post. Here’s why.
When the original artifacts that were found were initially reviewed by State of NH archeologists, they were thought to be Indian clay pot relics from 3000 years ago. However, after further study by archeologists and geologists, the leading theory now is that they are ferromanganese nodules/concretions formed by groundwater seeping into the lake and precipitating out the iron and manganese dissolved within.
With the initial hypothesis that the artifacts may have been 3000 years old, it was decided that the site should be “protected” until further studies had been completed, hence, I was asked to remove my post.
Additional dives were done at the site and the attached underwater video was taken. Much of the 20 minute video is hard to view. The best part of the video begins at 13:20 and clearly shows that there are many of these “artifacts” on the bottom. The depth is about 70 feet.
http://www.youtube.com/watch?v=_70BJkMuQTc
These are the original artifacts.