Afternoon,
Yep Uniface, it could be a spindle whorl.....I have seen several, but many were flatter and had a larger hole...most I have seen were made of pottery, but many different materials were used. They were used on pump drills and such to help with both drilling of holes and making rope by adding counterweight to the spin. Neat little artifacts really .....some from china are made of jade and quite elaborate.
By the way, love your San Pats.....cut my teeth on those points...always been my favorite. I personally think the San Patrice culture overlapped with Dalton...actually I think the same folks probably made them both depending on area.
Happy Hunting,
Atlantis