Spent many hours and walk for miles looking for tool in area, then find one in my backyard.
It's a very nice artifact. Multi purpose. The holes are for holding a spinning shaft of a bow drill when starting a fire or drilling wood. Stone is shaped to the hand and may have been used to abraid or dress skins. Nice one.
My understanding is that Omarulluks are Midwestern. This was found at a known site in the coastal CA mountains which are comprised of sandstone and decomposed granite. I suppose it’s possible that it is natural but context would lead me to believe otherwise.
I have to respectfully disagree. I have heard for years that these were used as Bow Drill Toppers but I have yet to see one that shows the polish inside the hole that would occur from wooden shafts rotating back and forth inside said hole. I never adhered to the "nutting stone" theory either. Why do you need a round stone with hole on both sides to break open a nut? Just put it on a flat surface and hit it with another stone. Viola, a broken open nut. I call them Pitted Stones and I believe most are either Hammerstones or Anvil Stones.
I have a lot of these Pitted Stones and none show polish in the divots.