Chain-like fossil from Cretaceous Alabama

[Rockwood]

Typha have this growth pattern.

[DPS Ammonite]

1 hour ago, aplomado said:

Ok, you all have me intrigued!!!

 

Here is a better picture.  The dark chain is about one inch long.  There are no fossils visible on the back of the matrix.  One of my family found this in a creek.

 

I agree with JohnJ; the dark areas are the same structure/fossil as the light areas. I think that the dark colored crack that seems to connect the whole thing might have introduced a dark colored mineral.

 

Since the pimple like structures seem to have a hole in the middle, but have a less regular looking structure that a coral or bryozoan might have, consider a sponge which were really common in the Cretaceous.

 

Search the literature of the formation that it came from for known sponges. What is the formation name?

 

https://www.worthpoint.com/worthopedia/british-fossil-sponge-faringdon-470835444

 

 

 

 

Edited December 8, 2021 by DPS Ammonite

[abyssunder]

Or there are trace fossils of some sort? 

[aplomado]

On 12/7/2021 at 9:59 PM, DPS Ammonite said:

 

 

 

Search the literature of the formation that it came from for known sponges. What is the formation name?

 

My find came from the Eutaw formation (Tombigbee sand member).

[Chase_E]

On 12/7/2021 at 9:27 PM, aplomado said:

Ok, you all have me intrigued!!!

 

Here is a better picture.  The dark chain is about one inch long.  There are no fossils visible on the back of the matrix.  One of my family found this in a creek.

Looks like a trace fossil of a boring sponge. We find this type of boring sponge trace fossil a lot in the Cretaceous of Alabama. If I remember to I'll get pictures. I think I have a couple specimens from the exact creek mentioned. 

[aplomado]

Please do!