What do I see here from the Cretaceous period of Vaals (Netherlands)

[Mart1980]

Another for me difficult fossils from the Vaalser groenzand (The Formation of Vaals or Vaalser Groenzand is a geological formation from the last Late Cretaceous). Fossils from the Vaals green sand are sparsely distributed, and yet it is extraordinarily rich in fossils. Unfortunately, very little is documented about it.

 

 

 

What do you think this is? I was thinking about sea lilies myself. But not sure....

 

 

A few more pictures, doesn't this look like sharing a stem? These pieces are relatively lightweight. Certainly in comparison with the Limestone itself. I can't identify the ribbed structure.

 

 

 

Edited June 5, 2023 by Mart1980

[rocket]

last pic looks like sponge to me

the other ones, I am unsure. Have seen the same structures in sandy sediments with hardened parts in it, this had not been a fossil

[Mart1980]

Mmmm , @rocket thanks for your input. What sandy formations are your talking about?

 

The problem is that most details get lost with preparation. I have to take more detailed photo later!

[rocket]

9 hours ago, Mart1980 said:

Mmmm , @rocket thanks for your input. What sandy formations are your talking about?

 

The problem is that most details get lost with preparation. I have to take more detailed photo later!

 

when I digged in sandy layers in münsterland basin or netherland (ENCI) I sometimes found hardend parts like the one you found

 

[Ludwigia]

Sandstone concretions