Unknown things

[fifbrindacier]

In the quarry of Bougue, department of Landes with the teeth of shark, i found several kinds of pectenids, numerous glycymerys, balanus (my first crustaceans) and crassostreae longirostris.

But when i broke one rock, i found those things i have taken in photo with different lightnings and angles, there is calcite at the end of the bigger one :

[fifbrindacier]

Here are the holes in which they were, there is calcite inside some of them :

 

In this one, there is a piece still in place (green circle), the other circles show the holes :

 

 

I don't think those are bivalves.

This is a place where you can find calcited driftwood, marine mammals (Mesocetus aquitanicus, Champsodelphis macrogenius), sharks, rays.

I have really no idea of what those things are and i hope someone could find a pist.

[Zalgork]

Looks like worm tubes that got filled in with calcite, I have some similar ones.

[abyssunder]

I'm going with ichnofossil on this one. Maybe Teredolites .

[fifbrindacier]

Here are the holes in which they were, there is calcite inside some of them :

 

 

Thanks a lot to both of you.

@abyssunder, i followed your link an found that Teredolites are good candidates. Do you think those one are from Teredinidae ?

And so, would that mean that the rocks where there are the holes are driftwood, or what remains of dristwood ?

[GeschWhat]

They could also be coprolites. It reminds me of these from the Rhaetic bone beds in Gloucestershire, England.

[fifbrindacier]

I'd rather vote for Teredolites as suggested @abyssunder, because i have just seen something that look likes an imprint of shell in a hole :

 

For comparison, here is a board i found on the net :

[abyssunder]

Teredolites is related to wood. If the support matrix of the borings has a wood origin, then they could be from "Teredo worms", wood-boring bivalves of the family Teredinidae.

 

Here is the document with the above mentioned picture : Kishor Kumar et al. Ichnospecies Teredolites longissimus and Teredinid Body Fossils from the Early Eocene of India—Taphonomic and Palaeoenvironmental Implications. Ichnos, 18:57–71, 2011.

Also, here is an excerpt showing calcite lined tubes :

[fifbrindacier]

48 minutes ago, abyssunder said:

Teredolites is related to wood. If the support matrix of the borings has a wood origin, then they could be from "Teredo worms", wood-boring bivalves of the family Teredinidae.

 

Here is the document with the above mentioned picture : Kishor Kumar et al. Ichnospecies Teredolites longissimus and Teredinid Body Fossils from the Early Eocene of India—Taphonomic and Palaeoenvironmental Implications. Ichnos, 18:57–71, 2011.

Also, here is an excerpt showing calcite lined tubes :

Thanks @abyssunder, this document is very informative. As the place where i found it was a littoral, you can find driftwood, but it was a very agitated one and on the piece in which they are the wood is difficult to see, very worn and damaged. So, when i first saw those things i thought as @GeschWhat that those could be some kind of coprolites, maybe of cetaceans because you can also find Syrenae bones (not the Syrenae of Ulysse, i am afraid). I tried to wash it a little more and i saw in some places the remnants of that wood.

Thanks to all three of you for your help.

[fifbrindacier]

Thanks again to everybody.

[marguy]

fifbrindacier,

geological notice for Bougue quarry  writes 'burrowing indurated filling ' (remplissages indurés de terriers, diamètre 2 cm) , see vertical cut;

[fifbrindacier]

17 hours ago, marguy said:

fifbrindacier,

geological notice for Bougue quarry  writes 'burrowing indurated filling ' (remplissages indurés de terriers, diamètre 2 cm) , see vertical cut;

I've missed that, thanks.