JamieLynn Posted July 24 Share Posted July 24 Since I have gone "down the rabbit hole" of Micro Matrix fossil hunting, I'm going to start a series of posts on the main time periods and locations I am collecting. I'll start off with the Best Of and then add in new finds. Of course, Texas Cretaceous is my primary interest, but will also have posts on Texas Pennsylvanian, Permian, Eocene and Pleistocene. Plus other posts on various locations around the country (and world!) SO if you like Micro fossils, keep an eye out for them! So Texas Cretaceous Best Micro Finds to start! Most of these are 1/8 inch (aprox 3mm) a few being up to 1/4 inch (aprox 6mm) 1. Ammonites -Del Rio and Eagle Ford Formations 2. Heteromorph Ammonites - Del Rio and Eagle Ford Formations 3. Bivalves - Del Rio, Glen Rose, and Ozan Formations 4. Corals - Del Rio and Ozan Formation 5. Crabs - Del Rio, Eagle Ford, Glen Rose, Corsicana and Walnut Formations 6. Crinoids - Glen Rose, Eagle Ford, and Del Rio Formations 7. Crocodilians - Aguja Formation 8. Dermal Denticles - Ozan, Aguja and Eagle Ford Formations 9. Dinosaurs -Aguja Formation 10. Echinoids - Del Rio and Glen Rose Formations Glen Rose Formation Glen Rose, Walnut, Austin Chalk and Eagle Ford Formations 11. Fish Teeth - Ozan, Del Rio, Aguja, Eagle Ford and Glen Rose Formation 12. Foraminifera - Ozan, Glen Rose, and Del Rio Formations 13. Gastropods - Del Rio and Eagle Ford Formations 14. Mammals - Aguja Formation 15. Marine Reptiles - Austin Chalk and Eagle Ford Formations 16. Rays - Del Rio, Wolfe City and Glen Rose Formations 17. Sawfish - Eagle Ford, Ozan and Austin Chalk Formations Aguja. Eagle Ford and Ozan Formations 18. Lamniforme Sharks- Ozan, Austin Chalk, Eagle Ford and Woodbine Formations: Ozan, Austin Chalk, Del Rio and Eagle Ford Formations: Del Rio, Eagle Ford, and Ozan Formations: 19. Non-Lamniforme Sharks - Ozan, Woodbine, Aguja and Eagle Ford Formations: 20. Ptychodontidae Sharks - Austin Chalk and Eagle Ford Formations: Austin Chalk Formation' 21. Starfish - Glen Rose, Walnut and Del Rio Formations 22. Vertebrae - Aguja, Del Rio, and Eagle Ford Formations 23. Worms -Del Rio, Corsicana. Ozan and Eagle Ford Formations 4 8 www.fossil-quest.com Link to comment Share on other sites More sharing options...
Jared C Posted July 24 Share Posted July 24 I love this collection. Thanks for posting 1 “Not only is the universe stranger than we think, it is stranger than we can think” -Werner Heisenberg Link to comment Share on other sites More sharing options...
Al Dente Posted July 24 Share Posted July 24 Very nice. This would make a good poster. I’m pretty sure this one is a brachiopod. Link to comment Share on other sites More sharing options...
JamieLynn Posted July 24 Author Share Posted July 24 @Al Dente Thanks! I do actually make posters of Texas Fossils! So that one is from the Ozan formation and the only Cretaceous brachiopod that I know of is Waconella (Kingena) wacoensis. This very much does look like a brach, but as I understand it, Waconella is the only one that made it into the Cretaceous, and I don't think they are as late as the Ozan which is Campanian. They are normally found in the Albian and Cenomanian. Now that I am looking at it it does have the same small hole as a brach. Perhaps I have somehow discovered a new brachiopod...wouldn't that be cool. I did find two of them in the same batch of matrix....now you've got me wondering if it might have been cross contamination. I am careful about washing out my screens and buckets, but it could still happen. But two of the same thing? Hmmmm........ This is the top of it, and the other one. 1 www.fossil-quest.com Link to comment Share on other sites More sharing options...
Coco Posted July 24 Share Posted July 24 Very nice presentation, as usual. Bravo ! Coco 1 1 ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Pareidolia : here Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
Mikrogeophagus Posted July 25 Share Posted July 25 Very cool micros! A useful guide for any TX hunter 4 hours ago, JamieLynn said: I highly doubt you cross contaminated because these little brachiopods are commonly found in Moss Creek matrix (also Ozan). I did a deep dive a long time ago, but can't remember what I found. NSR guidebook mentions them as an "unidentified Rhynchonnelid" brachiopod "formerly Choristothyris plicata" so that's a start. It certainly isn't C. plicata... When Hamm releases his paper on Moss, it might identify these. 7 hours ago, JamieLynn said: "Rhincodontidae" looks a bit like a coniasaur tooth to me! Certainly has a reptilian texture. 7 hours ago, JamieLynn said: The O. dunklei I assume are from the Aguja? Have you ever seen a rostral to that species from that formation? I am genuinely curious because it is so interesting how the Texas record has such a large gap for the genus from the Cenomanian to the Campanian. But I just can't seem to find the rostral online... Your micro collection is always fun for me to look through. I think it is because you are more appreciative of invertebrates and sift places more that narrow-minded people (me) tend to overlook. 3 Link to comment Share on other sites More sharing options...
JohnJ Posted July 25 Share Posted July 25 Great presentation and photography, Jamie! 1 The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
old bones Posted July 25 Share Posted July 25 Gorgeous images and layout, @JamieLynn! Lovely eye candy 1 Link to comment Share on other sites More sharing options...
JamieLynn Posted July 25 Author Share Posted July 25 @Mikrogeophagus thank you for the info!! I am glad to know I didn't cross contaminate...that's something I try to be very careful about, when you are processing various micro matrix, it definitely can happen., I am glad to know they are from that area. Something new to me! The Rhinocontidae is what was suggested here on FF. It's very tapered, unlike a Coniasaur, but I agree, it doesn't really look like what I have seen as Rhinocontidae either. As far as Onchopristis, NO, never seen a rostral, which is indeed odd. Just these little interesting teeth. 1 www.fossil-quest.com Link to comment Share on other sites More sharing options...
Notidanodon Posted July 25 Share Posted July 25 Great finds, quick question from someone suffering from trying to differentiate the Cretaceous lamniforms, do you have a resource that you look at? Link to comment Share on other sites More sharing options...
JamieLynn Posted July 26 Author Share Posted July 26 @Notidanodon - my goto book is Roger Farish's book The Collectors Guide to Fossil Sharks and Rays but you do have to take it with a little skepticism as it is not a scholarly publication per se. It has some discrepancies and some fallacies but overall is a good starting point. I have also relied heavily on the Fossil Forum members, especially @Mikrogeophagus, @Al Dente, @Jared C and @LSCHNELLE and others for help IDing. I have a gallery here that you are welcome to peruse - perhaps it can help you out a bit! It's not 100% up to date, still need to add a few of the newer finds. And I don't guarantee 100% accuracy..I'm always refining my IDs.... www.fossil-quest.com Link to comment Share on other sites More sharing options...
Notidanodon Posted July 27 Share Posted July 27 11 hours ago, JamieLynn said: @Notidanodon - my goto book is Roger Farish's book The Collectors Guide to Fossil Sharks and Rays but you do have to take it with a little skepticism as it is not a scholarly publication per se. It has some discrepancies and some fallacies but overall is a good starting point. I have also relied heavily on the Fossil Forum members, especially @Mikrogeophagus, @Al Dente, @Jared C and @LSCHNELLE and others for help IDing. I have a gallery here that you are welcome to peruse - perhaps it can help you out a bit! It's not 100% up to date, still need to add a few of the newer finds. And I don't guarantee 100% accuracy..I'm always refining my IDs.... Thanks I will have to try and purchase it! the members of the fossil forum are always very generous with their id help too! Link to comment Share on other sites More sharing options...
Jaybot Posted July 29 Share Posted July 29 On 7/24/2024 at 1:37 PM, JamieLynn said: 20. Ptychodontidae Sharks - Austin Chalk and Eagle Ford Formations: That Ptychodus latissimus has very nice colors. Also, your photography!!! -Jay “The earth doesn't need new continents, but new men.” ― Jules Verne, Twenty Thousand Leagues Under the Sea Link to comment Share on other sites More sharing options...
Mikrogeophagus Posted July 29 Share Posted July 29 Did a little reading on Onchopristis arising from Campanian deposits in North America. It seems, to my knowledge at least, there are no multi-barbed rostral denticles associated. A 2013 article by Kirkland (Elasmobranchs from Upper Cretaceous Freshwater Facies in Southern Utah) references Onchopristis from this age and instead refers to them as a new species, Columbusia deblieuxi (Middle Campanian of Southern Utah). They are pretty neat little teeth and I think your Aguja specimens are probably the same or at least very similar. The article pulls from freshwater deposits, so your little guy could probably swim up rivers. Also, the author, Jim Kirkland, was featured on a podcast episode recently. Great interview. Look up "Elasmocast" on YT to watch it. I only found the channel recently and they have some stellar chondrychthian content. 2 Link to comment Share on other sites More sharing options...
JamieLynn Posted July 29 Author Share Posted July 29 @Jaybot Thank you! I love photographing the fossils ALMOST as much as I love finding them....hahahah! @Mikrogeophagus Thanks for the info! I will check him out! 2 www.fossil-quest.com Link to comment Share on other sites More sharing options...
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