I'm just guessing but could be a Maul that's been eroded away in spots. Pics are kinda shady. More pics n better light! HH
I have to agree with Charl on his assessment. That appears to be an eroded concretion. I have found several very similar and may actually have some around the fish pond.
I appreciate the responses y'all, but definitely not concretion. The intricate design carved into the outer rim was definitely man made. It is an ornate pattern like you would see in ancient pottery. Best suggestion was by a local guy on Facebook, as he suggested that it may be a medicine bowl. Wish I could get y'all some better pics. I will try later, and thanks again for the responses. Hope y'all are having a great weekend!
Got it guys! It's a pre Columbian spindle whorl