Grinding stone?

[LanaClaire]

Found this on the Santa Ynez trail, still getting familiar with natural erosion patterns. The depression gets wider on one end, which is where my doubt lies. Otherwise it’s pretty symmetrical. Any thoughts? Thanks!

 

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[unclemac]

good enough for the yard but not good enough for display! Looks like water erosion.

 

[Gulf Coast Pirate]

It looks like it would make a great metate, but it doesn't look like it was used as one.

 

[oldmxrat]

Sorry, no human modification there.

 

[Treasure_Hunter]

Not seeing any signs of man, it looks like possible moving water erosion, was it found near a creek, stream, or river?

 

[LanaClaire]

Not seeing any signs of man, it looks like possible moving water erosion, was it found near a creek, stream, or river?

Yes, the trail follows a creek for a while. Thanks for the input!