We have found in the deep sea sediments in the Jurassic units in the Pontides of Northern Anatolia. The form that may be macrofossil that seen in the pictures. We are suspicious that this form could be a macro fossil (may be of ichthyosaurus). Is anyone have an idea what is this form fossils or another geological features?
Hi,
The photo's are not clear enough to say anything. It seems there is a circular feature of a certain size, but if you are thinking this may be the vertebral column, then I cannot see any evidence for that. I cannot see any identifying features that would indicate bone.
I include some images that show what an icthyosaur fossil would normally look like.
Any more questions - feel free.
Best regards,
Remmert
Couldn't these be folded deposits of turbidite flow? What is the lithology of this structure?
Dear colleagues,
It is difficult to diagnose this form and define its group using these images.
However, ,I think, this form is comparable to an uncoiled and/or loosely coiled ammonoid.
Please see the attached image.
The another related image is also available via the link:
(https://www.alamy.com/a-guide-to-the-fossil-invertebrate-animals-in-the-department-of-geology-and-palaeontology-in-the-british-museum-natural-history-e-changes-ending-in-the-straight-bhabdocerasof-the-various-ammonite-families-that-passed-into-jurassicand-cretaceous-times-the-stepheoceratidae-gave-off-adegenerate-branch-so-early-as-the-bajocian-age-theeccentric-gadomoceras-has-already-been-noticed-and-here-table-caseare-exhibited-the-further-uncoiled-spiroceras-crioceras-8hifurcatmn-and-similar-forms-which-led-to-the-straightbacidina-of-the-callovian-it-was-however-chiefly-towards-the-close-of-the-t-image342699236.html)
All the best.
Alaettin
(I am not an ammonoid specialist)
It would be nice to know the environments sedimentary type (lithology). Do not rule out the possibility that it is the backbone of an ichthyosaur or a shark, both from marine environments.
Dear Yavuz.
1. Try to make thin sections of the structure and study them under a microscope. Compare the results with the host rock data.
2. Make carbon analyzes of the structure and host rocks.
I wish you success!
It´s impossible from the pictueres, to decide if there is bone or not. Sea cows are abundant since tertiary, but not in jurassic sediments. May be it´s a possibility, to look into a section of the structure, to decide if it´s bone or not?
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