What are theses ?

[Denis Arcand]

I found these rocks in an Ordovician formation, collected them because they seam out of place, and found them intriguing.

 

Can anyone have any idea what this is, I'm not an expert but I think it could be a trace fossil made by a Bivalves, brachiopods or some sort of worm, or maybe just cement blocks.

 

 

#1

 

#2

 

#3

Edited June 21 by Denis Arcand

[Denis Arcand]

I don't know if this helps, this weird little shell fell off the first #1, when I was taking some pictures. . One side is round and the other side is flat at 90 degree angle ?

 

It looks recent, it may just have fallen in one of the hold ?

Edited June 21 by Denis Arcand

[DPS Ammonite]

That is a modern invasive Zebra Mussel.

 

https://en.m.wikipedia.org/wiki/Zebra_mussel

 

 

 

 

 

Edited June 22 by DPS Ammonite

[Denis Arcand]

12 minutes ago, DPS Ammonite said:

That is a modern invasive Zebra Mussel.

 

https://en.m.wikipedia.org/wiki/Zebra_mussel

 

 

 

Thanks @DPS Ammonite, now that you mention it, i am not surprised, the rocks were found in a water way.

 

Anything you can tell me about the rock full of holes ?

Edited June 22 by Denis Arcand

[Denis Arcand]

Are these holes in the rocks formed naturally or are they created by biological creatures like the zebra mussel?

Edited July 1 by Denis Arcand

[Denis Arcand]

I think they could be Gastrochaenolites (Leynerie, 1842), I will try to see if the opening region is narrower than the chamber, which could help establish a positive identification.

Edited July 1 by Denis Arcand