I found a fossil that I don't know what it is and I need help to identify it.

[firio]

It looks like a fin or a wing and I have never seen anything like it. The maps say that it is an area of the Cretaceous period. The measurements are 10 cm long and 9 cm wide. I leave the measurements in the photos.

 

Aragon Region of Spain.

 

 

 

 

 

 

[Fossildude19]

Looks like ripple marks, or some sort of sedimentary structure, rather than a fossil, to me. 

No fin rays, or bones present. No wing or fin structures.

Geologic, in my opinion.

[firio]

3 hours ago, Fossildude19 said:

Para mí, parecen marcas de ondas o algún tipo de estructura sedimentaria, más que un fósil. 

No hay radios en las aletas ni huesos. No hay estructuras en las alas ni en las aletas.

Geológico, en mi opinión.

That's what I thought, but the waves you're talking about can't occur that way, and besides, I found it in an area where there are fossils with identical characteristics that I was able to identify.

The thing about the wings or fins was to say something, sorry if I implied that it was that. 

I searched the internet for photos to see if anything would come up and I found this. It is made of the same material.

[firio]

1 minute ago, firio said:

Eso pensé, pero las ondas de las que hablas no pueden ocurrir de esa manera, y además lo encontré en una zona donde hay fósiles con características idénticas que pude identificar.

Lo de las alas o aletas era para decir algo, perdón si di a entender que era eso. 

Busqué fotos en Internet para ver si aparecía algo y encontré esto. Está hecho del mismo material.

(this is something similar to mine, I'm not saying it is)

[Ludwigia]

I agree with Tim. This is not a fossil, at the most ripple marks and certainly not a wing or a fin. If you don't agree with this assessment, then take it to your nearest paleontologist and ask him to identify it.

[Fin Lover]

7 minutes ago, firio said:

That's what I thought, but the waves you're talking about can't occur that way, and besides, I found it in an area where there are fossils with identical characteristics that I was able to identify.

Why do you believe ripple marks can't occur that way?  And what are the other fossils you have identified with "identical characteristics"?  I'm also just seeing something geological.