Crinoid columnals ?

[Quer]

I found yesterday this -I guess- pieces of crinoid columnals in a Lias (Hettangian) strata. In my area -Pedraforca zone, SE of Pyrenees- Jurassic sites and crinoids are rare (most sites are Upper Cretaceous), so I know very little about them. Tne only crinoid mentioned for the area and period is Pentacrinites.

Can you confirm/refute my guess? Thanks.

 

[abyssunder]

They doesn't look like Pentacrinites stem fragments, to me. Maybe some crinoid stem-to root or just holdfast fragments, or belemnite rostrum fragments, in my thinking.

[Rockwood]

5 minutes ago, abyssunder said:

belemnite rostrum fragments, in my thinking.

That was my first reaction.

[abyssunder]

I think, there might be another alternative, maybe the Cretaceous Baculite hypothesis. 

[Ludwigia]

I'm almost 100% sure that those are pieces of belemnite rostra.

[Phevo]

I agree with belemnite rostra

[Quer]

Thank guys, belemnite rostra makes sense. There are some recognisable belemnite rostra fragments embedded in rocks in the site. I didn't think of it. 

[TqB]

They are definitely belemnite fragments. If that is Hettangian, then they're also extremely rare! There's just a handful known from Europe - in most places, belemnites first appear above the base of the Sinemurian, in the Semicostatum Zone, where they're suddenly common.

[Quer]

4 hours ago, TqB said:

They are definitely belemnite fragments. If that is Hettangian, then they're also extremely rare! There's just a handful known from Europe - in most places, belemnites first appear above the base of the Sinemurian, in the Semicostatum Zone, where they're suddenly common.

You are true, I have come it's not Hettangian. It's not my fault as Geological Map misled me.

I found this belemnite fragments in a site rich in brachiopods, and I've found that the site is included in this paper (in french). In short: the site is middle Lias (Sinemurian/Pleinsbachian), maybe too small to be recorded in the Geological Map.

 

Thanks

[TqB]

4 hours ago, Quer said:

You are true, I have come it's not Hettangian. It's not my fault as Geological Map misled me.

I found this belemnite fragments in a site rich in brachiopods, and I've found that the site is included in this paper (in french). In short: the site is middle Lias (Sinemurian/Pleinsbachian), maybe too small to be recorded in the Geological Map.

 

Thanks

Pity it's not Hettangian but I'm glad you've sorted it out!