Fossilized Shells, found on the Coast of West Jutland.

[DannieJ]

Hello, I am new here so please bear with me,

 

I have been picking these up over the last decade of walking my dog on the coast of Thyborøn in West Jutland, Denmark.

Incidentally, this is where the sea-battle of Jutland took place during the first world war.

 

My questions are very basic:

 

1) These are all fossils right?

 

And if this is correct,

 

2) How old are they and by how much would you say their respective age differs, is this even possible to say?

3) Are any of these interesting or considered good quality?

 

These are laid out in a similar pattern. Sorted by color and size and apparent quality. 

Ask me for better images of any one of these and I will deliver ASAP. Simply ask for the

specific shell by number starting from the upper left corner, the upper line will be 1--5 from left to right

and the second line will 6-10 from left to right etc. 

 

Thank you very much,

Dannie

[ynot]

Welcome to TFF!

Most (if not all) are oyster shell pieces.

They do look like they are fossils, but it is hard to be sure from a picture.

Will have to look at the formation information to determine the age.

[DannieJ]

19 minutes ago, ynot said:

Welcome to TFF!

Most (if not all) are oyster shell pieces.

They do look like they are fossils, but it is hard to be sure from a picture.

Will have to look at the formation information to determine the age.

 

Thank you.

 

So far so good, looks like my intuition was correct then and I should keep collecting these

 

How can I supply formation information? Is this found on the inside of the shell?

I have noticed some of the shells have layers, please see attached images.

 

You are looking at No 8, No 14 and No 20:

Edited July 5, 2017 by DannieJ

[ynot]

Formation information is only found on the shells "made in China".

Look at geologic maps of the area You are searching and they will give formation name and age.

[Miocene_Mason]

According to this map, they are around 2 to 5 million years old, in the Pliocene epoch. Also, there is a salthorst, which from what I can gather is a upwelling of salt, although I don't think that means anything. One with more knowledge than myself could maybe give a more exact date based on the species you have here.

[DannieJ]

9 hours ago, ynot said:

Formation information is only found on the shells "made in China".

Look at geologic maps of the area You are searching and they will give formation name and age.

 

Thanks  I was way off on the age, I thought rocky fossils were much much older, but looking at articles

and picture concerning that epoch, I can see how mine fit right in.

 

"Denmark produces around 600.000 tonnes of salt a year from a giant saltdome (saltdiapir, salthorst) by the bay of Mariager. This diapir is so large that salt is likely to be mined there for the next 16.000 years."

 

I don't suppose this mining operation or the saltdiapir itself could have some relationship with fossils?

[Guguita2104]

They don't look like fossils to me...I've already found similar ones in beaches with no known/record fossils.