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Fossil Identification


What is that stain ?


fifbrindacier   14-10-2017 om 14:29

fifbrindacier
Gewoon Lid
Lid sinds: 07-12-2016
Berichten: 55









Hi everybody. In my collection i have some fossils i inherited a few years ago. In those ones i have that little goniolina hexagona from the Kimmeridgian of Angoulins sur mer, in the department of Charentes-Maritimes.
I always wondered what could be that stain behind the Goniolina (behind the left side of it on the first photo).
It looks like some kind of phoronid but could also be mineral.

Regards, Sophie.

 
fifbrindacier   14-10-2017 om 16:39

fifbrindacier
Gewoon Lid
Lid sinds: 07-12-2016
Berichten: 55

I must precise that the stain is about 1,5 centimeters long.

[Edited by fifbrindacier on 14-10-2017 at 16:39 GMT +1]

 
FossilDude   18-10-2017 om 17:09

FossilDude
Administrator
Fotobeheerder
Lid sinds: 24-11-2007
Berichten: 1367

I am sorry Sophie, I have no idea what this stain could be... These kind of things are often very difficult. Perhaps it is 'something' fossil, perhaps it is not.

cheers,
Johan

____________________________
Van je hobby je beroep maken.... kan het nog beter?

 
KoenJ   18-10-2017 om 18:03

KoenJ
Senior Lid
Lid sinds: 23-02-2015
Berichten: 1282

Hi! I think it's a serpulid seen from below. You see it from the point where it used to be attached to the shell.

In the Dutch-Belgian cretaceous they're quite common in sea urchins, oisters and the remains of aragonitic bivalves and gastropodes.

[Bewerkt door KoenJ op 18-10-2017 om 18:04 NL]

____________________________
Groeten,
Koen

 
fifbrindacier   19-10-2017 om 18:16

fifbrindacier
Gewoon Lid
Lid sinds: 07-12-2016
Berichten: 55

I thought you might be right, my supposition of phoronid comes from that funny stain at the top of it, with those two points in the alignment of each half part of the rest of the stain (you can see some "kind" of vertical separation on it).
In fact, if you look well, it seems that the Goniolina and this are on a deteriored shell of gasteropod.

Regards,
Sophie.

[Edited by fifbrindacier on 19-10-2017 at 18:17 GMT +1]

[Edited by fifbrindacier on 19-10-2017 at 18:18 GMT +1]

 




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