Thin section from uppermost Cretaceous mudstone (P. hariaensis zone) Haymana Basin-Central Anatolia.
It could be fossil resin. Please check it at crossed nicols: it should be homogenous, so black under any rotation angle.
people, please check the scale... this is a tiny thing... i can say at least that this "thingy" seem to lack any internal structre (e.g., bone porosities, tracheids or crystallite if considering invertebrates)... maybe its just a sectioned fragment of silica or could be also organic material.... maybe algae or plant material (simmilar to the immature organic material leading to petroleum)...
this hypotheses can be also associated to the rock type, because it seems you have there a sandstone...
cheers!
this is amorphous phosphate and this represent a stop in sedimentation by the K/T boundary. you might also have gloconite which is green. these amorphous phosphates show you that the K/T boundary must be a few meters below where you spot them.
Hello Uygar,
To me, it is phosphatic indeed, not a sedimentary lag. It belongs most likely to a fish osteoderm (most possibly shark).
Regards.
Hi Uygar,
Your specimen might be a Dinoflagellate fossils.
Regards.
Hakima
Dear Uygar,
First of all, your sample shows that, it is very finely laminated siltstone or very fine sandstone. Secondly, since the boundary of an object is very thick and very sharp with respect to the matrix, there is the possibility that an object in the micrograph is an external object that has fallen on the slide while you were preparing the thin section.
with best regards,
Habib.
It looks like Dinoflagellates Muderongia or Odontochitina or Aptia, but looks bigger size a little bit? which age of this rock? is it early Cretaceous? I guess you have to carry Palynological analysis for a small part of this rock sample to be sure if those are Dinoflagellates or not & which geological age, so we could think more correctly within such Geological age / period limit.
@Hussein Mahrous, It is from latest Cretaceous. 15cm below the K-Pg boundary.
I suggest to carry on Palynological analysis & check dinoflagellate assemblages, if it has similar Dinoflagellates or not, but please do Palynological analysis very carefully as Late Cretaceous Dinoflagellates are very fragile & sometimes it has reworked Miospores & Dinoflagellates from Cenomanian & Early Cretaceous, but they have different color tone & sometimes fractured; at then you can think about another options.
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