Weird limestone fossil

[Jurassicz1]

Does anybody know What this is? Found on a beach in Sweden but came from Denmark with the glaciers. I posted something before but a guy said the picture was not there so tell me if u cant see it and if so please then tell how to post im new here

 

[Mahnmut]

Hello and welcome.

I can see the picture clearly. Looks like traces of holeboring organsms to me, I first thought of serpulids for the more smooth parts, but I cannot explain the punctuated pattern on the lowest piece.

Intresting, lets hear what the experts say.

Best regards,

J

[Tidgy's Dad]

Yes, interesting.

Scale? 

[fossilnut]

Following up on Tidgy's Dad question can you provide a picture of the entire piece at less magnification as well as a ruler showing the size?

[Jurassicz1]

9 minutes ago, Tidgy's Dad said:

Yes, interesting.

Scale? 

Around 1 cm

[Jurassicz1]

3 minutes ago, fossilnut said:

Following up on Tidgy's Dad question can you provide a picture of the entire piece at less magnification as well as a ruler showing the size?

dont mind the mario ruler its not mine 

[TqB]

The holes look like modern Polydora borings. 

 

The plates may be echinoderm fragments of some sort.

Edited September 4, 2020 by TqB

[Jurassicz1]

22 hours ago, TqB said:

The holes look like modern Polydora borings. 

 

The plates may be echinoderm fragments of some sort.

Here are some pictures closeup

Edited September 5, 2020 by Jurassicz1
Forgot to write text

[Johannes]

Borings are recent/subrecent. Object in the second picture of the last answer belong to a starfish. Should be from the Upper Cretaceous or Palaeocene. I'm not sure with the pronounced danish origin.

[Jurassicz1]

On 9/10/2020 at 5:06 PM, Johannes said:

Borings are recent/subrecent. Object in the second picture of the last answer belong to a starfish. Should be from the Upper Cretaceous or Palaeocene. I'm not sure with the pronounced danish origin.

Might be a late respond but about the pronounced Danish orgin. I read and saw that there are Cretaceous limestone deposits and claystone deposits in Kattegatt.

 

Altough there are also some unknown geology at some parts too. Theres some little Triassic sandstone and middle jurassic claystone. Is this why i find fossils at beaches in kattegatt?

 

But i only find Cretaceous limestone and flint (i assume its Cretaceous from the geology map) but never any jurassic/Triassic? Can they wash up to beaches?

 

And i assume claystone becomes clay underwater? So maybe claystone fossils wash up loose?

 

Heres some pictures of the geology maps.

 

The grey is unknown, Green is Cretaceous,  Blue is Middle Jurassic claystone, Purple is triassic sandstone, And the purple blue Colour? Is Rhaetian-tithonian coal, Shale, Sandstone, Clay.