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Found 129 results

  1. I found this crystalline calcite replacement fossil mold after breaking open the width of a 2" to 3" thick Eagle Ford limestone layer loose fragment. The rock broke along the circular arc of the fossil mold. The mold is somewhat mushroom shaped with a small inoceramus clam attached to the side. It is about 4.25" wide. A full circular arc might be more than 6 inches in diameter. The mold appears to be fragmented and hollow on the top of "mushroom shaped" side. The narrower bottom of the mold also flared out a little, but not as much as the top. I think that the thin base layer cutting at 30 degrees to the mold is an oyster shell hash layer that it was deposited with - although at the mold top the hash layer to be unusually smooth faced. Some of the calcite mushroom lip broke out on the other fragment (the 4th photo shows it upside down on the bottom). The lip was not likely to be easily recovered. So, I cut that face of the limestone fragment back from the lip so that the two can fit together where you can still see the concave fossil surface inside. I worked off the convex outer matrix of the mold and the micrite limestone matrix until there was little else left but the mold. The oyster hash (or other) layer and the small inoceramus are also attached. The limestone layers in the outcrop area has some 15mm or less tooth width sized Ptychodus and up to 12 to 20 mm long cutter shark's teeth. There were also two ammonite molds (10" to 12") preserved in similar crystalline manner. There are a few shark verts and fish/ray teeth also. The few Paleontological Society of Austin folks I showed it to at the recent meeting could only see the concave face before I had carved it out more. They would not try to guess its origin. My first inclination was that it is a large vertebrate bone fragment. That might have been just well wishing. A giant inoceramus hinge plate or other large invertebrate (like ammonite or nautiloid) interior mold seems more likely. Any educated guesses? Thanks in advance for your time.
  2. Just found this bone out of the eagle Ford group in north central Texas. 86-90 mya. I'm guessing it's mosasaur or turtle? One end is broken off. 4 inches length. If so can we get a bone ID from it? Limb bone? Thanks for any help.
  3. South Texas fossil could be reptile that swam 90M years ago San Antonio Express-news, January 2, 2017 (Picture of Fossil) http://www.expressnews.com/news/texas/article/South-Texas-fossil-could-be-reptile-that-swam-90M-10830843.php Hike in the Eagle Ford takes geologist back 92 million years (Picture of Fossil) By Ryan Maye Handy, Houston chronicle, December 28, 2016 http://www.houstonchronicle.com/business/article/A-hike-in-the-Eagle-Ford-takes-geologist-back-92-10823601.php Complete reptile fossil ‘important find’ Hamilton Spectator, Waterloo chronicle, January 3, 2016 http://www.waterloochronicle.ca/news-story/7048220-complete-reptile-fossil-important-find-/ Yours, Paul H.
  4. Eagle Ford bone

    Possible to tell what this bone is from? Found in Dallas County.
  5. Texas Tooth

    Found this reptile tooth in Dallas County. What do y'all think it is?
  6. Fun day on POC

    Hola! I decided to get up early this morning to head over to Post Oak Creek to see if I could make up for the lack of production on the NSR (North Silted Ridges). I headed over to my favorite spot to sift and after seeing a tooth or two lying on the surface, I decided to walk the entire gravel bar to see what else may be up on top. I came across a monster horse shoe (this guy must have been a beast) and jokingly thought to myself that it meant I was going to have a good day. Well, that joke turned into reality. I walked past where I found the horse shoe and this honker was lying in wait for someone to find. This is the biggest shark tooth by far for me. I felt like a kid on Christmas that just opened his dream present. I believe its Cretodus. Please correct me if I'm wrong. After gathering two 5 gallon buckets worth of gravel, I headed back toward the car and decided to take a breather (10 gallons of wet gravel weights more than 10 gallons of feathers ). While walking around I found the little bottle. I then walked over to another gravel bar and found my first mosasaur vert in the POC. If the POC had the size and quantity of mosasaur verts and teeth that the NSR does, I'd never leave Sherman. Speaking of the NSR, if you haven't been in awhile, you may want to wait. I spent about 6 hours out there this past Thursday and while there is some low lying water in the river and creek beds, all the gravel bars I saw were covered in silt. It's in serious need of a good heavy rain and I'm waiting till then before I go back out. David
  7. Went for a quick hunt this past Sunday and found this gem ('huge' is relative, it's huge in my books). My guess is P. Decurrens? If not, what gives away the correct ID? Thank you! Nicole
  8. What a fun day. I was out of my normal area, waiting on a pizza and got bored. So I checked the map to see if there were any potential creeks in the area for arrowhead hunting. Found an interesting looking spot and headed over after my lunch. I spent around 30 minutes looking when I decided that it wasn't a very good spot. I went back to where I entered the creek and as a stepped out I looked down and saw discs lying all along the shale. I've never seen so many centrums in one spot. Went back to the jeep and got tools. Luckily it was soft shale so I could easily remove them. The more I removed the more I found. All told it came out to 95 total. I never would have spotted them if I hadn't entered the creek at that exact spot. What a crazy hobby. I'll have to go back after the next rain and look for more. Can I assume these all belong to the same fish? Late Cretaceous Eagle Ford Group- 90 mya
  9. It's about 1.5" long and 1" wide at its widest point.
  10. What are these from?

    I am not familiar with those grooves, almost looks like turtle bone. I wont even guess on the other, came up with everything from cow to shark lol. Somebody educate me!
  11. Please id strange little jaw & teeth

    So perplexed by this, there are oval teeth, circular ones, and one that looks human with a filling lol. Can't quite picture the bite, can someone help me out? This is the best my camera will do sorry.
  12. Ostrea alifera var. pediformis Craigin

    This is a Cretaceous oyster that I found in Post Oak Creek in Sherman, Texas. The oyster has traces of a yellowish calcite-cemented sandstone found in the upper part of the Arcadia Park Formation of the Eagle Ford Group. "Pediformis" in the name, Ostrea alifera var. pediformis, means foot-shaped or pediform because the oyster looks like a foot or boot. In "The Lower Cretaceous Gryphaeas of the Texas Region", Bulletin of the US Geological Survey #151, 1898, author Robert Thomas Hill eliminated the Ostrea alifera Cragin, and Ostrea alifera var. pediformis Cragin names because he considered them to be Ostrea lugubris Conrad. I disagree with Hill's decision because my oyster is larger than most O. lugubris (now Cameleolopha lugubris) and lacks an attachment scar characteristic of O. lugubris. My oyster may be a genus Cameleolopha since both Cameleolopha bellaplicata and Cameleolopha lugubris occur nearby. Unless new information can be found, my oyster should be called: Ostrea alifera variety pediformis Craigin. For more information and drawings of Ostrea alifera and Ostrea alifera variety pediformis Craigin see: Cragin, F. W., "A Contribution to the Invertebrate Paleontology of the Texas Cretaceous", Austin, Texas, B.C. Jones & Co., State printers, 1893.
  13. Possible Inoceramus?

    I was wondering if someone familiar with Eagle Ford fossils from the Las Colinas, Texas area could identify this. I think it looks like Inoceramus, but am not sure. For size reference, the graph paper that it is sitting on is 1/4" grid.
  14. Unidentified Eagle Ford Fossil

    Please help me ID this fossil. It is from the Austin, TX Upper Bouldin Flags Member. It is in a zone associated with Ptychodus anonymous. It is about 13 mm diameter at rounded end by 18 mm long - broken.
  15. Post Oak Creek, Texas Oyster

    What is this Cretaceous oyster that I found in Post Oak Creek in Sherman, Texas? Most oysters in the creek come from a yellowish calcite-cemented sandstone from the Arcadia Park Formation of the Eagle Ford Group. It is about 48mm in length.
  16. 1" x 3", top and side view. The back is unremarkable, but I can post more views if needed. Any help is much appreciated, as always.
  17. 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 2.5cm to 4cm across. The coralites range from 4mm to 6mm 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: "Hindeastraea discoidea White from the Eagle Ford shale, Dallas County, Texas", : Fondren Science Ser., no. 2, 11 p., illus by Bob Frank Perkins. 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 The original publication on Hindeastraea discoidea is: https://books.google.com/books?id=H33u7anq2SwC&pg=PA363&lpg=PA363&dq=Hindeastraea+discoidea&source=bl&ots=0llhetALED&sig=JdRP8rsUCaKjZjCbSFCXO4ibBIY&hl=en&sa=X&ved=0ahUKEwjLidvOl6zPAhUG5GMKHd3EDjYQ6AEIPjAH#v=onepage&q=Hindeastraea discoidea&f=false Please let me know if you know what species this coral is.
  18. 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).
  19. Cretaceous Eagle Ford fish material?

    Front, back, end views. Approx. 3" x 1.5" If fish, what part? I've never seen this before.
  20. Found in Collin County

    Took a quick walk up the accessible part of a creek not too far from where I live and happened across this nice little vert.
  21. The rock it's imbedded in is approx. 1" x 2". Cretaceous, Eagle Ford. It would be plausible to find one in this area, I'm just not 100% convinced and thought you guys might have an opinion. Thanks for any help.
  22. Any idea if this is bone or shell? What might this be? Any help is very much appreciated. About 3/4" square. Thanks!
  23. BIG Texas Shark tooth

    From the tip of the root ( seems it may be longer, going further in the rock ) to the tip of the crown is a little over 2 1/4 inches. Dallas County, Atco Formation What say the experts?
  24. Texas Eagle Ford Exogyra Fossil

    In early July 2016, I encountered a virtual self-guide field trip posted online by Pete R. Rose, PhD in February 2012. He describes an Eagle Ford (Kef) outcrop exposed in the parking lot of Barton Creek Mall in Austin, Texas. I went there to check it out. The USGS webviewer only designates the area as Georgetown-Del Rio. But, the U.T. Bureau of Economic Geology has an accurate Geologic Quadrangle Map #38 that shows this feature. But, it predates Barton Creek Mall which is not on the map. Interestingly, the Austin Chalk Atco Member caps the nearby hilltops, but it is heavily weathered to caliche and rusty ferrous minerals. Difficult to find fossils in the transition zone. The South Bosque member is clearly visible and underlain by the Bouldin Flags (BF) Member. The BF has much thicker flaggy beds than I usually see (up to one foot thick). In the lower part of the BF, I extracted this beautiful slab of what I think are Exogyra columbella levis (Meek). The largest ones are ~1" wide. Most of the Kef outcrops I have visited have just fragmented oyster hash. This is the first time, I have seen the complete fossils rather than just rounded fragments. Also, I think a nearby rock had traces of a fish fin on it. I took a picture just after dark, but left the fossil there. It was a very large rock and a paper-thin fossil remnant. I believe it was about 6 to 8" long. Anyone have better IDs? I was surprised to see Exogyra in the Kef. Lee Schnelle
  25. Texas Cretaceous Shark Tooth ID

    Found this shark tooth in the Atco Formation, what's the species?