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Found 17 results

  1. MargaretRieden

    Hello from Northeast Texas, USA

    We have forty some acres in rural and rugged northeast Texas, bisected by several huge rock bottom creeks. I'll enjoy sharing my finds with everyone, and learning along the way. 4WD country!
  2. My son found these today 4/10/23 at Post Oak Creek - Just curious if anyone can help us identify them. Thanks!!
  3. Chelsie

    Shark Teeth from Post Oak Creek

    I’d like for my Post Oak Creek collection identified (specifically the shark teeth), but I can’t find much information online about the species of shark whose teeth are found here (Post Oak Creek in Sherman, Texas). When I HAVE come across general information about the creek and other peoples findings online, there aren’t any pictures of the teeth or nobody else knows exactly what they have. It’s also hard to tell if I’m grouping them correctly, so I apologize if I’m mixing some species together. The longer teeth have very similar characteristics, but greatly differ in size. And the only teeth that I HAVE been able to identify are the ptychodus teeth (not pictured), but only because they’re so unusual in appearance. Excuse the quality of the images. I don’t feel like setting up my camera right now, but I do plan on taking clearer images once I’ve correctly identified each specimen.
  4. I’ve decided to post this one separately. Very unusual composition. If you watch the video, you’ll see that light refracts off of tiny crystals in the center of each segment (which I’ve circled in red in another image). It’s hardly noticeable. The specimen is very smooth and rounded. Another member said in a different post of mine that it could possibly be an inoceramid hinge, though my own research resulted in nothing. I can’t find anything online that remotely resembles my specimen (inoceramid or otherwise). I found it at Post Oak Creek in Sherman, Texas. FullSizeRender.MOV
  5. Chelsie

    My latest find!

    My husband and I like to go on walks along the wooded dirt trails behind our home. Last winter, we stumbled upon a particular stretch of path. It was constructed using refractory bricks smack dab in the middle of the woods. It wasn’t until recently when we decided to revisit the area. One does not simply stumble upon an old brick path in the middle of the woods. It had to have once led somewhere. We did, in fact, find an old stone well nearby. Across from the well, there’s the foundation of a house that’s nothing but rubble. I also found an A&W Root Beer can amongst the rubble. It was the 1968 to 1995 A&W logo. Most of the bricks were branded, but I could hardly make out the wording. The name Louis was clear as day on quite a few of the smaller fragments, but the more intact bricks had lettering that was harder to read. I managed to find a single brick that wasn’t so weathered. I knelt down to read what was branded on it, but this little coral fragment caught my attention. It was wedged between the bricks in the center of the path, almost as if it were placed there intentionally. I don’t see how else it could have gotten there. After further inspection, the coral (a honeycomb coral) appears to be fused to an unidentifiable species of mollusk. Fossilized oysters and clams are common finds in my area, but this is the first fossilized coral I’ve found. FullSizeRender.MOV
  6. freerangetraveler

    Possible Enamel???

    Spent the day out on Post Oak Creek in Sherman Texas… I met some new friends and found a fairly good haul of shark teeth. In addition, I think I may have stumbled across a small piece of enamel… Maybe mastodon??? I’d love to get the groups thoughts on what that is (or tell me if I’m way off base). cheers!
  7. TiffMarie

    Tooth ID

    Just wondering if anyone can tell me what these might be?! My boys were ecstatic to find them. Thanks!! found in Post Oak Creek, TX
  8. I came upon this beauty in Post Oak Creek, Sherman; Grayson Co. Texas this past weekend which looks like a very large Armadillo scute. I didn't think that they migrated into the north Texas region? It measures 1 1/2" long and 1 1/8" wide. Cretaceous, Lower Austin / Upper Eagle Ford Formation
  9. KimTexan

    Septarian nodule?

    I found the coolest rock I may have ever found today while out hunting for fossils. I hit the mother load on the fossils, but the rock is absolutely more fascinating at this point. More on the fossils later. I think the rock is a fragment of a septarian nodule that seems to be comprised almost entirely of what I believe may be aragonite and maybe a tiny bit of calcite. I found it in Post Oak Creek practically in the Sherman city limits. The formation in the creek is Alluvium which is Quaternary, Holocene, Cenozoic (in reverse order) I believe. It is surrounded by Austin chalk which is cretaceous. Can anyone help confirm the identity or tell me otherwise? Also, can anyone educate me about septarian nodules of this nature in the Alluvium or do you think It came out of the Austin Chalk? Any help our input is appreciated. Close up so you can see the crystle color and crystal form. Is it araganite? @ynot I know you’re a crystle/mineral guy. What do you think? Any idea how it formed? I saw a different kind of septarian nodule last week at Fossilmania in Glen Rose that came from the Main Street formation in Dallas county that were formed around ammonites. These look pretty different than those though.I’d call this the top down look. Side 1 of 5. It looks a bit like a thin separating ridge or wall/fin like structure that is also aragonite looking or a brown crystal. Side 2. There are some kind of clear yellow crystals mixed with the brown with a different shape to them. There’s even some amber looking color in there. Side 3 Side 4 Side 5
  10. KimTexan

    Post Oak Creek fossil ID

    I found these in Post Oak Creek near Sherman city limits. The formation within the creek is Alluvium which is Quaternary, Holocene, Cenozoic (in reverse order) I believe. It is surrounded by Austin chalk which is cretaceous. I have no idea what they are. I’m certain I’ve seen a modern version of this while Scuba diving, but for the life of me I can’t remember what it was or where I saw it. They look a little like a barnacle, but not exactly, maybe a tube worm colony? Please let me know your thoughts.
  11. KimTexan

    Modern or fossil oyster?

    I found this in the Post Oak Creek near Sherman, TX today. I kind of think it looks like a modern oyster, but I found it with many, many well preserved fossil shells. How do I tell it is a fossil vs modern? It has barnacles on it. See far right and far left. You can see the muscle scar so clearly. It was found with these other fossilized shells in the creek bed.
  12. CrazyDiamond

    Post Oak Creek help identify

    Post Oak Creek, Sherman, Texas. Period is crustaceous - found this in the water while digging and scooping from the bottom. A guy who was down in the creek said it looks like it's a land animals tooth. The size is about the size of a quarter, if I set it on top of a quarter it's the same length. I found a ton of sharks teeth I was trying to post in a gallery to share, but I guess I haven't figured that out yet because I don't see them LOL. Thank you for your help. Laura
  13. CrazyDiamond

    Shark Teeth

    From the album: Post Oak Creek, Sherman, Texas

    Sharks teeth I found in Post Oak Creek, Sherman, Texas
  14. shaun0fthedead

    curious about this one, perhaps a tooth?

    Recently went fossil hunting for the first time in Sherman, TX at post oak creek. I found loads of shark teeth, but this one though small caught my eye. Doesn't have a root, perhaps it is just a tip; but the general shape is different from all the shark teeth I found. So maybe it is something else (hopefully not just a rock) It is pretty small. Attaching a couple of pictures on from top view, side.
  15. DPS Ammonite

    Cameleolopha bellaplicata

    Here are interior and exterior views of both valves of the Cretaceous oyster, Cameleolopha bellaplicata, collected in Post Oak Creek in Sherman, Texas, The specimen is more oval and elongated that most of the members of its species. The calcite valves with a trace of interior aragonite, mother of pearl, are covered in yellowish calcite cemented sandstone. The larger valve has the remnants of an attached ramose bryozoan that grew on the shell since the muddy Arcadia Park Formation did not provide a great hard ground to grow on. An unidentified domed colonial stone coral species also grow on the oysters in the area. The oysters are found in the upper part of the Arcadia Park Formation that contains a yellowish calcareous sandstone that is rich in small bivalves, shark teeth and other vertebrates. Similar mostly thin-bedded, yellowish and calcareous sandstones occur throughout north Texas and may be related to the thicker Bells Sandstone in eastern Grayson County. See this best reference: Hook, S. C. & Cobban, W. A. 2011. The Late Cretaceous oyster Cameleolopha bellaplicata (Shumard1860), guide fossil to middle Turonian strata in New Mexico. New Mexico Geology. 33: 67-95. Hook points out that Cameleolopha bellaplicata was "initially Ostrea, then Lopha, Alectryonia, and Nicaisolopha, and, now, Cameleolopha." Hook describes the oyster as follows: "Cameleolopha bellaplicata (Shumard 1860) is a medium-sized, plano-convex oyster with 8–27 generally simple plicae (ribs) that radi­ate from the beak. Secondary ornamentation consists of concentric lamellae that intersect the ribs. The general absence of attachment scars on preserved left valves indicates the species lived unattached as adults on the sea floor. Its left valve is larger and more convex than that of C. lugubris, giving it a more robust appearance and making it better suited to higher-energy, nearshore environments. The type specimens of C. bellaplicata came from the upper Eagle Ford Shale of Grayson County, Texas..." For additional information on the oyster see: Shumard, B. F., 1860. Descriptions of new Cretaceous fossils from Texas: Transactions of the Academy of Science of St. Louis, v. 1, pp. 590–610. Vyalov, O. S., 1936. Sur la classification des huîtres: URSS Academy of Sciences, Comptes rendus (Doklady), new series, v. 4 (13), no. 1 (105), pp. 17–20 (after August 1).
  16. DPS Ammonite

    Coral

    Here is an unidentified semi-spherical colony of stony coral, collected in Post Oak Creek in Sherman, Texas, This is the largest colony that I have found at the site. The colonies range in size from 2.5 cm to 4 cm across. The coralites range from 4 mm to 6 mm across. This specimen has traces of the oyster, (probably Cameleolopha bellaplicata) that it grew on since the muddy Arcadia Park Formation did not provide a suitable hard ground. Other specimens of the coral also all grew on oysters. Traces of yellowish calcite-cemented sandstone clings to the coral. The coral occurs in a yellowish calcite-cemented sandstone in the upper part of the Arcadia Park Formation that may be related to the Bells Sandstone in eastern Grayson County. Numerous Cameleolopha bellaplicata oysters and lesser amounts of small bivalves occur at the site. Numerous shark teeth and other vertebrate fossils also occur with the coral. An unidentified ramose bryozoan also grows on the oysters in the area. Although unidentified, this coral looks a lot like Hindeastraea discoidea (which occurs in the yellowish calcite-cemented sandstone layers in the upper part of the Arcadia Park Formation) as found in this reference: Perkins, Bob F. 1951. Hindeastraea discoidea White from the Eagle Ford Shale, Dallas County, Texas. Fondren Science Series 2: 1–11. Try this link for the pdf copy: https://sites.smu.edu/shulermuseum/publication_pdfs/fondren_sci/v2-Perkins1951a.pdf Also here is a link to Hindeastraea discoidea White, 1888, holotype (left) and paratype: http://www.corallosphere.org/taxon/721.html White CA. (1888). Hindeastraea, a new generic form of Cretaceous Astraeidae. Geological Magazine, New Series 3. 5: 362-364. The original publication on Hindeastraea discoidea is: link Please let me know if you know what species this coral is.
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