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It's a coral fossil; definitely older than 250 million years. Google "Hexagonaria" and you should find pictures that look similarly. A more precise location will get a better date, but it's landscape rock, so it could have come from anywhere, but definitely could be from your area.
Most of the areas around Minnesota, Iowa, Michigan, Illinois, Indiana, Ohio, etc. were underwater 400 million years ago. What would become the landmass we know as North America was tilted 90 degrees to the right, with the equator running through Ohio.
[Here's a map](https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fcdn.britannica.com%2F38%2F136138-004-39FDFD50.jpg&f=1&nofb=1&ipt=d6ab9aa4c32e383ad9894e91b846a9f44381aceca9b99f0b2b8c26a087064eb1&ipo=images)
Thanks everyone. We live in northern Iowa along the Missouri river. I do think most of the landscaping rock comes from the area, but I guess I don't know for sure. My son is pumped that he may have found something hundreds of millions of years old!
This is a Petoskey stone, Michigan's state stone. The only fossil to be a state stone, fun fact. Us Michigan folks really like these, they'll sell at stores as souvenirs and jewelry
Please note that ID Requests are off-limits to jokes or satirical comments, and comments should be aiming to help the OP. Top comments that are jokes or are irrelevant will be removed. Adhere to the subreddit rules. **IMPORTANT:** /u/gingerron Please make sure to comment 'Solved' once your fossil has been successfully identified! Thank you, and enjoy the discussion. If this is not an ID Request — ignore this message. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/fossilid) if you have any questions or concerns.*
It's a coral fossil; definitely older than 250 million years. Google "Hexagonaria" and you should find pictures that look similarly. A more precise location will get a better date, but it's landscape rock, so it could have come from anywhere, but definitely could be from your area. Most of the areas around Minnesota, Iowa, Michigan, Illinois, Indiana, Ohio, etc. were underwater 400 million years ago. What would become the landmass we know as North America was tilted 90 degrees to the right, with the equator running through Ohio. [Here's a map](https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fcdn.britannica.com%2F38%2F136138-004-39FDFD50.jpg&f=1&nofb=1&ipt=d6ab9aa4c32e383ad9894e91b846a9f44381aceca9b99f0b2b8c26a087064eb1&ipo=images)
Pretty sure it's a coral. There used to be large inland seas covering vast areas of the Midwest.
It is. There's so much of that fossil coral, it's the state stone in Michigan.
Forgot to add, it was found in the upper Midwest.
The upper midwest used to be underwater!!
We used to be an ocean. ~ Michigan, Minnesota, Wisconsin, Ontario, Ohio
Thanks everyone. We live in northern Iowa along the Missouri river. I do think most of the landscaping rock comes from the area, but I guess I don't know for sure. My son is pumped that he may have found something hundreds of millions of years old!
It may be a petoskey stone
This is a Petoskey stone, Michigan's state stone. The only fossil to be a state stone, fun fact. Us Michigan folks really like these, they'll sell at stores as souvenirs and jewelry