What is this?

[LeviBess]

Hi, i have this worn rock that i found in Calvados, Cretaceous or jurassic sediments. I was thinking it was a weathered echinoid at first but it does not really look like it. Any idea?

[Lone Hunter]

Knowing the size and some other veiws would be helpful.

[LeviBess]

Yes of course sorry, im at work ( working so hard... so cant post any more pics now but the cross thingy is  like 7 cm across. And the other sides is really just rock with holes in it. 

[Lone Hunter]

Thanks. I don'tknow kinda funky looking shape for an Echinoid. Someone will know no doubt.

[LeviBess]

Thank you for answering, yes it does not match up. I hope someone will figure this one out.

[PaleoOrdo]

Maybe a trace fossil, a worm, because the ends of the lines goes into some small "caves"?

[LeviBess]

Yes it could be this, but im not fully convinced, i will take better pictures once home. Thanks for the answer 

[Fossildude19]

I'm in the trace fossil camp. 

[Myrmica]

The symmetry is wrong for an echinoderm (4 'branches' vs. 5), and no central disc to go with the long 'arms', so I don't think it falls into that group.

[Daniel Fischer]

I think it's a trace fossil or not a fossil at all. I think it also might be a plant, I wouldn't think it is but it is above the triassic... It's also important to say that I don't know much about any of these fossils.

[Fossildude19]

1 hour ago, Daniel Fischer said:

I think it's a trace fossil or not a fossil at all. I think it also might be a plant, I wouldn't think it is but it is above the triassic... It's also important to say that I don't know much about any of these fossils.

Not plant - plants do not preserve this way.