2nd Jan, 2023
National iranian oil company
Question
Asked 30th Aug, 2022
What is this!?
Hello, everyone. I'm studying an Aptian shallow marine succession (Western Tethys) and I have come across this strange structure in one of my samples. I originally thought it was some kind of serpulid colony, but it seems radically different from the serpulid remains that commonly occur in other samples. Me and my colleagues are at a loss...
For context, this sample was taken towards the top of a shallowing-upward sequence, near a sequence boundary with subaerial exposure.
Can somebody shed some light on the subject? :-)
Most recent answer
Hi everyone. I agree with yours and Dr. Felix Schlagintweit's idea. it could be serpulids.l worm tubs.
All Answers (9)
Ola Alvaro..in my opinion these sre serpulids showing layered wall structure..keep in mind that serpulids may exhibit different types of microstructures..see e.g. Flügel 2004 plate 92. Saludos!
2 Recommendations
Dalila Turki Thanks!
Antoni Lacasa Ruiz Thanks!
Late response sorry but going in the same direction. Reminds me some aggregations of serpulids forming some dm to m-scale mounded structures.
Worms certainly come to mind, but what is the matrix like? It looks rather dark, could it be woody? In which case they could be calcite-lined Teredolites burrows which are common in wood found in shallow-water environments.
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