Fossil ?

[nala]

I'm wondering if this strange rock have fossils tracks on it or not , perhaps actual worms tracks? but it is the only one stone i saw like that on the site

[tracer]

look kinda like serpulid worm tubes to me.

[sjaak]

I agree. I've seen a lot of these at Wimereux.

[nala]

Thanks for the replies Tracer and Sjaak,i didn't pay attention at this kind of stone before on the site,it is always possible to discover!this is an another strange tracks probably mineral,if somebody have an idea

[sjaak]

I was told by a geologist that these are burrows caused by little animals in a low energy environment(slow waters). In a high energy environment these burrows would be mixed up by the water and would not have a chance to fossilize.

[nala]

I was told by a geologist that these are burrows caused by little animals in a low energy environment(slow waters). In a high energy environment these burrows would be mixed up by the water and would not have a chance to fossilize.

Now it is clear for me thanks,Sjaak

[erose]

Serpulids actually make little shell tubes. I believe they are still present in the seas today and are like feather duster worms.