DerekJ Posted August 1, 2018 Share Posted August 1, 2018 The included photograph shows a fossil that we can’t quite place. Would any of you be able to positively identify the fossil we found at Portmarnock Beach, Ireland. We think it may be Estonioceras but are not sure. It is approximately 7cm in diameter. Can anybody shed some light on this. Thanks. Link to comment Share on other sites More sharing options...
The Amateur Paleontologist Posted August 1, 2018 Share Posted August 1, 2018 Welcome to TFF, Derek That's a nice specimen.. Definitely a coiled cephalopod. Looked up Estonioceras; it's kinda similar to what you have - but I'm not sure.. Do you know the age of the site where the fossil was found? That might help with identifying the fossil. I'd also suggest maybe some clearer pictures of the specimen. Hope this helps -Christian Opalised fossils are the best: a wonderful mix between paleontology and mineralogy! Q. Where do dinosaurs study? A. At Khaan Academy!... My ResearchGate profile Link to comment Share on other sites More sharing options...
DerekJ Posted August 1, 2018 Author Share Posted August 1, 2018 Thanks for replying so quickly. The rock primarily consists of limestone shale. According to the geological map of Portmarnock the rock is from the Carboniferous era and, having given it more thought, the fossil is therefore unlikely to be Estonioceras. Unfortunately we only had a phone-camera without us at the time and we should've used a coin next to it for determining the size more accurately. If you have any further leads, we'd love to hear about it. Thanks! Link to comment Share on other sites More sharing options...
The Amateur Paleontologist Posted August 1, 2018 Share Posted August 1, 2018 So, we've got location, age and lithology (the rock). That's a good start it still allows for the possibility of your specimen being some kind of primitive ammonoid. This could help: http://www.portmarnock.org/geology-across-the-rocks.php -Christian Opalised fossils are the best: a wonderful mix between paleontology and mineralogy! Q. Where do dinosaurs study? A. At Khaan Academy!... My ResearchGate profile Link to comment Share on other sites More sharing options...
DerekJ Posted August 1, 2018 Author Share Posted August 1, 2018 Thanks so much for putting us on the right path. We really appreciate your input and we'll definitely pursue this further. Cheers! Link to comment Share on other sites More sharing options...
westcoast Posted August 1, 2018 Share Posted August 1, 2018 I'm not seeing any evidence of chambers or septa in this specimen.. Link to comment Share on other sites More sharing options...
Aurelius Posted August 1, 2018 Share Posted August 1, 2018 I had thought it looked more like a gastropod, personally. Link to comment Share on other sites More sharing options...
izak_ Posted August 1, 2018 Share Posted August 1, 2018 I agree, looks like a gastropod. Link to comment Share on other sites More sharing options...
DerekJ Posted August 2, 2018 Author Share Posted August 2, 2018 We're going to have to go back and find it again if at all possible. Photograph it, this time with a higher resolution and better lighting conditions. Thanks for all the replies so far. Link to comment Share on other sites More sharing options...
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