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Rudist or other bivalve ?


fifbrindacier

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Among my founds i have Rynchostreonae, Pycnodonts, and also Rudists : a Polyconites, some Sphaerulites and some pieces of Ichthyosarcolites.

But i wonder about this piece. Is it a Rudist, an Oyster, or something else ?

IMG_1743.thumb.JPG.5915f666712d25ba51dc665da57c94e5.JPGIMG_1745.thumb.JPG.142d9a09d17e2780becbe057e4d7c8af.JPG

IMG_1746.thumb.JPG.a812ea9084015f8428de1a010cc370e9.JPGIMG_1748.thumb.JPG.d281de0c6b19a7804b5869de37d8edc0.JPG

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"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

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It could be a worn rudist fragment with bivalve and tube worm borings. I would like to compare with Durania.

 

IMG_1743.JPG.35aaf7a0f7f5a9d340da288533d5464d.thumb.JPG.686c4f66d4e9ba6dc8da266a6a5e1e1d.JPGdurania1.thumb.jpg.fb522c3456c7b68447f1f563a67d9109.jpg

comparative picture from here

" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

Thomas Mann

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A piece of rudist, that's what i would have said at the first place.

Thanks Abyssunder.

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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6 hours ago, HansTheLoser said:

The second image looks like Ichthyosarcolites, that would be Cenomanian then.

In fact its a place where you can find early and late cenomanian, i've noted it in the tags, but some of us can't visualize them. So i'm sorry, i should have precise it.

I agree it looks like a trace of ichthyosarcolites, i think its something else.

See below, photos of what i have.

It might be a worn part of Sphaerulites foliaceus with borings, but there is a resemblance with the photo of Durania @abyssunder posted. Did the duraniae occured in the cenomanian ?

 

Ichthyosarcolites triangularis :

IMG_1655.thumb.JPG.f6adee47494eeb4d36d15cfe31a6b147.JPGIMG_1663.thumb.JPG.bb872d4cc324fcc95fa09378d43a1a0e.JPGIMG_1664.thumb.JPG.d5927907a9cdb6a626baa8ec2988a59a.JPG

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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Sphaerulites foliaceus :

IMG_1698.thumb.JPG.aea3a97dff2c2456f1953c56aee90748.JPGIMG_1699.thumb.JPG.0400eee8962eb13f5d391860b2338a9a.JPG

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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Sphaerulites foliaceus :

IMG_1702.thumb.JPG.d349a265e2d6c92d88c9014842fc42fc.JPGIMG_1704.thumb.JPG.599d8cebadfe26cad6e16664ca4ee972.JPG

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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Yes, Durania is present in the Upper Cretaceous/Cenomanian.

 

Lupu.jpg.7a93cf724b36d6bdbd1f072223476394.jpg

D. Lupu. 1992. Les facies a rudistes du Cenomanien de Hateg (Carpathes meridionales, Roumanie). Geologica Romana 28:351-358

 

" Rudistes
La quantité de rudistes est très différente d’un falun cénomanien à l’autre. Ainsi, à Archingeay, ils y sont relativement peu abondants, avec surtout des fragments d’Ichthyosarcolites triangularis et quelques petits Praeradiolites fleuriaui dans le niveau 3, peu induré. À Cadeuil, les mêmes espèces abondent dans le même niveau. Dans les deux gisements, le niveau 4, plus induré, est marqué par l’épanouissement des Ichthyosarcolites, accompagnés par quelques rares Sphaerulites foliaceus, et cela au détriment des huîtres dont l’abondance diminue alors drastiquement. "  - R. Vullo et al. 2003. Un faciès de type falun dans le Cénomanien basal de Charente-Maritime (France). Annales de Paléontologie 89: 171–189

 

59c92cab6d4f3_NoteFalunsce_nomaniens.thumb.jpg.0566c3ae010b84fce982a66d8b297dfa.jpg

 

I think the specimen in question might be from a Sphaerulites foliaceus rudist.

" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

Thomas Mann

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Thank you very much Abyssunder.:D

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"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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On 1 octobre 2017 at 9:02 PM, HansTheLoser said:

I would rather trust the French guys then Lupu ...

 

Sorry, i don't understand : Lupu... ?

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"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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Thanks a lot @HansTheLoser.:D

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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