cthomp50 Posted July 24, 2019 Share Posted July 24, 2019 I’m not sure what I have here. I was thinking it was some type of worn ammonite... it’s been in my rock garden for years and I can’t remember for sure, but think I found it either up near Paris or west of Fort Worth. Regardless, I chipped away at it today to reveal the hidden side. But it was not what I was expecting. (And what are the two small encased stones?) Link to comment Share on other sites More sharing options...
cthomp50 Posted July 24, 2019 Author Share Posted July 24, 2019 Link to comment Share on other sites More sharing options...
cthomp50 Posted July 24, 2019 Author Share Posted July 24, 2019 Link to comment Share on other sites More sharing options...
cthomp50 Posted July 24, 2019 Author Share Posted July 24, 2019 Link to comment Share on other sites More sharing options...
cthomp50 Posted July 24, 2019 Author Share Posted July 24, 2019 Link to comment Share on other sites More sharing options...
cthomp50 Posted July 24, 2019 Author Share Posted July 24, 2019 Link to comment Share on other sites More sharing options...
cthomp50 Posted July 24, 2019 Author Share Posted July 24, 2019 Link to comment Share on other sites More sharing options...
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DPS Ammonite Posted July 24, 2019 Share Posted July 24, 2019 The slightly curving bundles of tubes are interesting in photo below. They might be Serpula worm tubes similar to the ones found in the Cretaceous Goodland Formation of north Texas. Maybe the serpula lived inside a large coiled mollusk. @FranzBernhard See magnification of top photo. They look even more like the internal molds of serpula. The tubes are of various sizes and meander slightly. Note possible coiled Spirorbis worm tube. Photo below also also looks like serpula: Another possibility is some sort of coiled rudist. They have weird vesicular textures. 3 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Ludwigia Posted July 24, 2019 Share Posted July 24, 2019 I'm thinking maybe gastropod which was infested by tube worms after death and decomposition or maybe those regularly formed tubes are burrows? This is really intriguing. There is anyway a small gastropod (or tube worm?) in the last photo bottom left. As an afterthought, maybe it was originally a small nautilus. 2 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted July 24, 2019 Share Posted July 24, 2019 Very interesting fossil. I would think hard and visit the place where I found it a few more times to find more. There's a lot going on in there. This may be worthy of scientific study. Mark. Fossil hunting is easy -- they don't run away when you shoot at them! Link to comment Share on other sites More sharing options...
Darktooth Posted July 24, 2019 Share Posted July 24, 2019 Very Interesting piece! I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
Heteromorph Posted July 25, 2019 Share Posted July 25, 2019 I’m with DPS Ammonite. Looks to me like the insides of a rudist, Edwards Formation. The curled, nautilus-like shape is the curved rudist. See: Edwards Formation Rudist Identification Also see: An unknown Temnocidaris species from an unknown Texas formation with associated fauna Rudists are one of the most commonly misidentified fossils, since they take on so many different shapes. 5 Link to comment Share on other sites More sharing options...
erose Posted July 25, 2019 Share Posted July 25, 2019 Yes, rudist. 3 Link to comment Share on other sites More sharing options...
FranzBernhard Posted July 25, 2019 Share Posted July 25, 2019 Sorry, but I am not able not give an educated guess on this one. 7 hours ago, Mark Kmiecik said: visit the place where I found it a few more times to find more I would do this also, and make some transverse sections. However, it is not clear to me, if there are some remnants of the actual shell or if the specimen is completely a steinkern. Franz Bernhard Link to comment Share on other sites More sharing options...
Ludwigia Posted July 25, 2019 Share Posted July 25, 2019 5 hours ago, Heteromorph said: I’m with DPS Ammonite. Looks to me like the insides of a rudist, Edwards Formation. The curled, nautilus-like shape is the curved rudist. See: Edwards Formation Rudist Identification Also see: An unknown Temnocidaris species from an unknown Texas formation with associated fauna Rudists are one of the most commonly misidentified fossils, since they take on so many different shapes. 5 hours ago, erose said: Yes, rudist. Then are those tubular forms remnants of the shell or part of the internal structure or? Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
erose Posted July 25, 2019 Share Posted July 25, 2019 7 hours ago, Ludwigia said: Then are those tubular forms remnants of the shell or part of the internal structure or? Yes, internal structure. Possibly some sort of vascular system. But these critters are long since extinct and I don't believe there any modern analogs to compare to. 2 Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted July 25, 2019 Share Posted July 25, 2019 For everything weird found in Texas, start with rudist. Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
fifbrindacier Posted July 25, 2019 Share Posted July 25, 2019 I also think it is a rudist because the general shape and tubular shapes fit with what i saw serveral times with some rudists. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
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