mosaic pattern on danish beach rock

[anonaddict]

location: aarhus, denmark

found: loose beach rock

units: metric

 

the pattern somewhat resembles that of belemnites with their internal structure preserved however the size is much smaller than any belemnites ive found and its very tightly packed, much more so than id expect belemnites to be which is why i believe I might be dealing with something different. potential options ive considered also include a fragment of a crinoid fossil or sea lily stems which would explain tmhiw tightly it is packed but ive never seen either of those preserved in this manner.

[Fossildude19]

Looks like a cross section through a tabulate coral, maybe something like Favosites.

[mighty micraster]

Could it be a badly preserved echinoid test?

[Coco]

A am afraid not, it has neither the form nor the characteristics: ambulacra, interambulacraires plates, pairs of pores, gonopores, periprocte, peristome etc...

 

Coco

[anonaddict]

1 hour ago, mighty micraster said:

Could it be a badly preserved echinoid test?

not a bad idea given the pattern, i realize now i didnt include the top down view which makes it clearer its several layers. it is shared here for future reference

 

I think @Fossildude19i hit the nail on the head with his comment

4 hours ago, Fossildude19 said:

Looks like a cross section through a tabulate coral, maybe something like Favosites.

after looking at some pictures it seems like a very likely match

 

thanks to all of you for sharing your thoughts