On several occasions in the past, we have discussed the mystery of that class of artifact known as plummets, and relatives like California Charmstones. Here is an older thread, from the info center, and discussing various fishing weights, etc.
For educational purposes, here is a short description of a plummet found far off shore in 70 feet of water, which the author suggests points to fishing weights as their intended usage. Last article at the link:
For educational purposes, here is a short description of a plummet found far off shore in 70 feet of water, which the author suggests points to fishing weights as their intended usage. Last article at the link: