HeiZ Posted June 20, 2019 Share Posted June 20, 2019 A family member had this sitting next to their fireplace. I am generally clueless, but I'll try and give you as much information as I can. This was found partially buried in central Michigan in a field. There's a lake in the general area. Useful details: Generally bowling ball sized. About 35lb / 15kg, 12" (300mm) or so in the longer dimension. Concrete like feeling to it. It's non-ferrous. For all I know it was some junk leftover from someone pouring a sidewalk, that happened to take an interesting form. Can anyone point me in a good direction of what this is? Let me know if there's any more details that would help, and I can try to answer your question. Slightly bigger images in the imgur link I put below. https://imgur.com/a/SKTFon2 Link to comment Share on other sites More sharing options...
ynot Posted June 20, 2019 Share Posted June 20, 2019 Oddly eroded limestone cobble. May be fossils in it, but they are not identifiable in picture. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
HeiZ Posted June 20, 2019 Author Share Posted June 20, 2019 Thanks for the ideas, ran it by more rock focused people and learned it is a concretion. Link to comment Share on other sites More sharing options...
abyssunder Posted June 20, 2019 Share Posted June 20, 2019 very interesting " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
daves64 Posted June 20, 2019 Share Posted June 20, 2019 Looks like something from a SciFi movie.. Accomplishing the impossible means only that the boss will add it to your regular duties. Link to comment Share on other sites More sharing options...
caldigger Posted June 20, 2019 Share Posted June 20, 2019 7 minutes ago, daves64 said: Looks like something from a SciFi movie.. Unhatched pod from "Invasion of the Body Snatchers". 3 Link to comment Share on other sites More sharing options...
smokeriderdon Posted June 20, 2019 Share Posted June 20, 2019 Yep concretion. The lumps and ridges are likely rock that is more silica and the surrounding is more pure limestone. The limestone erodes easier than the silica and there you go. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now