Fibonacci Fossil

[jugglerguy]

I found this near Alpena, Michigan in the lake.  In this area, I find Petoskey stones, favorites, occasional chain coral, occasional horn corals, and large, branching fossils in a black matrix.  There are Devonian era fossils in this area.  Obviously, I am not a fossil expert, I was mostly looking for Petoskey stones and pudding stones for lapidary purposes.  I hunt this beach quite often, but have never found a fossil like this.  It has a Fibonacci pattern like pine cones or sunflowers have.

 

[Tidgy's Dad]

Interesting erosion of a favositid tabulate coral, i think. 

[jugglerguy]

Thanks Tidgy's Dad.  We have favosites around here, but I've never seen one with a pattern like that.

[TqB]

I don't know what it is but it doesn't look like a favositid, especially the last photo.

Would a receptaculitid fit the whole structure? :

[jugglerguy]

If that question was directed at me, I have to admit that I have no idea what a receptaculatid is.

[Ludwigia]

4 hours ago, jugglerguy said:

If that question was directed at me, I have to admit that I have no idea what a receptaculatid is.

https://en.wikipedia.org/wiki/Receptaculites

[Johannes]

On 17.9.2018 at 5:44 PM, TqB said:

 

Would a receptaculitid fit the whole structure? :

 

I agree. This is for sure a fragment of a Receptaculites

[jugglerguy]

Well, that’s cool.  Funny that I compared it to a sunflower without having any idea there was a sunflower fossil.  Thanks!

[abyssunder]

On 9/17/2018 at 6:44 PM, TqB said:

Would a receptaculitid fit the whole structure?

It could be very well a receptaculitid.