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What is this fossil??? (Northern Michigan) Never seen anything like it


A.Stuntz

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Anybody know what this is??? I found this fossil on a limestone (possibly glacial deposit) cliff in  northern Michigan in the UP, it’s on Bois Blanc Island (right next to Mackinac island). I’ve been fossil hunting in this region for years and have never seen anything like it. Coral??? Anyone know??? (Btw it’s probably from the Devonian or Silurian). Thanks so much!!!!

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A piece of sea urchin with spines preserved in different orientations?

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A piece of a rostroconch.

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...How to Philosophize with a Hammer

 

 

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To me it looks like an impression of rope or other fibrous object in concrete.

 

 

Mark.

 

Fossil hunting is easy -- they don't run away when you shoot at them!

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  • 3 weeks later...

Definitely not an echinoid or concrete.  I was hesitant on the rostroconch guess but after looking at some of mine, I conclude that is probably a good conclusion.  Here is a pic of one of my specimens.  Yours is probably just disarticulated.

Joe

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Thank you very much! I’m probably going to mark it under Rostoconch

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Do you know where I might find a picture of a distorted one?

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I still think it's a woven rivercane basket impression in cement or concrete. Google it.

 

 

Mark.

 

Fossil hunting is easy -- they don't run away when you shoot at them!

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