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reply to post by CraftBuilder
The second photo looks like the characters from the Kensington RuneStone.
I'm guessing it was used to grind corn in to corn meal. The side that looks like the sun is probably the bottom that sits on the ground while the other side has a lip that helps keep the corn meal from spilling out.
My guess for whatever that's worth.
I didn't notice that before. It almost looks like a pterodactyl.
reply to post by bigfatfurrytexan
I think the top of this plate took the damage unfortunately. If you look under the obvious new striations it appears to me that there is a glyph.
Please help identify the culture responsible for this object and it’s age.
An acquaintance of mine found this stone in an agricultural field in Alberta, Canada
It is a relief style carving from what appears to be local field stone (not verified). It is about the size of a dinner plate. The smallest diameter is about 20.3 cm and the largest diameter is about 21.6cm. It is about 2.5cm thick. The relief stands out about 3-4mm and the outside diameter of the circle in the depiction is about 8cm.
The back of the artifact is deeply scarred from modern agricultural machinery, however there is also a carving visible on the back from a completely different method used on the front. It is the more typical thin line scraped carving seen in very old petroglyphs. I’m hoping somebody recognizes this symbol.
The stone is much darker than it appears in the images. Where it has been recently chipped it is a very uniform single shade of black and is very granite like.
So much careful work was put into this artifact that I believe it had considerable importance. Artifacts like this are not common for the area and I don't know if it might be completely unique. We see a lot of tools (arrow heads, hammer stones) but not elaborate stone artwork like this.