Paolo997 Posted November 25, 2022 Share Posted November 25, 2022 Hi Forum, i'd like to know what is or what caused this striped part of this rock and the little dotted part on the top. I collected it in the Omhden quarry (Germany, next to Holzmaden) the length of the striped part is about 5cm while the max length of the rock is 17cm Thanks a lot Paolo Link to post Share on other sites
Darktooth Posted November 25, 2022 Share Posted November 25, 2022 (edited) Can you get a close-up pic of just the area in question? I am getting crinoid vibes but am not sure if they are even found from that formation Edited November 25, 2022 by Darktooth 1 Link to post Share on other sites
Ludwigia Posted November 26, 2022 Share Posted November 26, 2022 9 hours ago, Darktooth said: Can you get a close-up pic of just the area in question? I am getting crinoid vibes but am not sure if they are even found from that formation The photos can be enlarged when you click on them, but I'm not seeing anything that looks like crinoid when I do. I'm not at all sure what these features are, but I don't think that they are fossiliferous. Otherwise I'm seeing ammonite impressions on the plate. Link to post Share on other sites
Paolo997 Posted November 26, 2022 Author Share Posted November 26, 2022 Hi, i took some photos at sun light. Yeah, the plate surface is 100% covered by ammonites impressions. In fact i thought was something ammonite-related Thanks Paolo Link to post Share on other sites
Paolo997 Posted November 28, 2022 Author Share Posted November 28, 2022 Hi, does anyone have a clue on this? Thanks Paolo Link to post Share on other sites
Lone Hunter Posted November 29, 2022 Share Posted November 29, 2022 5 hours ago, Paolo997 said: does anyone have a clue on this? What are you asking about? Link to post Share on other sites
Rockwood Posted November 29, 2022 Share Posted November 29, 2022 Conceivably the wrinkled look could relate to the periostracum or decay product thereof. I can't say I've ever seen the exact feature identified as such however. 2 Link to post Share on other sites
Fossildude19 Posted November 29, 2022 Share Posted November 29, 2022 Could also be some sort of epibiont on the bivalve shell. 1 Link to post Share on other sites
Paolo997 Posted November 29, 2022 Author Share Posted November 29, 2022 Hi, probably i've got it! Could it be a bad preserved Aptychus? Because i've found these pictures online and it looks quite similar what do you think? (sources apt1.png, apt2.png, apt3.png) Thanks a lot Paolo 2 Link to post Share on other sites
Coco Posted November 30, 2022 Share Posted November 30, 2022 Did they have two aptichus ? I thought the ammonites had only one. Coco Link to post Share on other sites
Rockwood Posted November 30, 2022 Share Posted November 30, 2022 Aptichi. Yep two. Link to post Share on other sites
Rockwood Posted November 30, 2022 Share Posted November 30, 2022 11 hours ago, Paolo997 said: Could it be a bad preserved Aptychus? Seems likely to me. Link to post Share on other sites
Bringing Fossils to Life Posted November 30, 2022 Share Posted November 30, 2022 Nice find!!! Found this online, looks pretty accurate. 1 Link to post Share on other sites
Ludwigia Posted November 30, 2022 Share Posted November 30, 2022 I could also see the possibility that this is an Aptychus. Cornaptychus can be found relatively often in these layers. 2 Link to post Share on other sites
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