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Found 9 results

  1. My wife and I found five Ptychodus latissimus from the same small pocket in the Atco Member basal conglomerate in the last seven months here in Travis County, Texas USA. I am pretty proud of these finds given the rarity of the teeth.
  2. Got out for a brief 30 minute hunt in September at my favorite Basal Atco outcrop in Travis County for Ptychodus. I found a couple of rare teeth - P. latissimus! Please see pics. The largest is 26 mm tooth width (TW)) with 13 mm tooth height and 6 mm crown height. The smaller fragmented tooth is >16 mm TW. Also, at another location in August, I found a couple of nice teeth: a 23 mm TW P. mammilaris and a 16 mm TW P. mortoni. Both had complete roots for a change. Probably 90% of Atco locations around here have no or very few macro fossils except oyster/clam fragments. But, this one has yielded about 45 Ptychodus teeth over two years plus many regular shark's teeth. Most of these teeth are absent most or all of the root mass. Ptychodus finds have included: 1 P. atcoensis (15 mm TW), 1 P. mammilaris (9 mm TW), and the balance are P. mortoni up to 26 mm TW or unidentified species <8 mm TW. I am especially pumped up with these two finds!
  3. Found this chunk of a bone with matrix attached yesterday. This was lying in the creek next to Eagle Ford/Atco Formation. About 6 x 2 inches. First thought was Mosasaur jaw bone but it also looks fishy. Any thoughts? Thanks.. Far north central Texas upper cretaceous 85-92 mya ...
  4. 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?
  5. Texas Cretaceous Shark Tooth ID

    Found this shark tooth in the Atco Formation, what's the species?
  6. My finds so far from the Dallas Paleo Society field trip to the Martin Marietta quarry. ( I still have a lot of matrix to break down.) IDs are based on my comparing the teeth to the best of my ability with Welton & Farish's book on fossil sharks & rays of Cretaceous Texas. A shark tooth peeking out of the matrix. I managed to fumble-finger while trying to extract it in the field, and lost the side cusp. An overview of the teeth. Top row, L to R: Unknown, Cretodus, Scapanorynchus, unknown, Cretolamna. Bottow row, L to R: Carcharias? symphyseal tooth, broken Scapanorynchus crown, rest unknown. (Continued in next post)
  7. I found this object partially visible in a chunk of matrix from the Martin Marietta quarry near Midlothian, Texas. (Formerly the TXI quarry.) The site is listed as being basal Atco contact between the Eagle Ford shale & the Austin Chalk. The rock I found this in was Eagle Ford shale. At first I thought it might be a tooth, but on-site tentative ID was possibly brachiopod, but as the ends were buried in matrix, no one could be sure. I do note a "ridge" down one side that LOOKS almost like the worn serrated edge of a tooth, but the broken end of the piece doesn't look like tooth structure.
  8. Found this odd claw-like bit today while sorting through gravel from Post Oak Creek. Any ideas as to what this might be? Scale is in mm. Dark photo just to show scale. Both sides of the object. The best shot I could get of the "proximal" end of the thing.
  9. Basal Atco

    Austin Chalk/Eagle Ford Basal Atco fish conglomerate zone of North Texas On a recent outing with my 7 year old grandaughter we were at a construction site where the the basal Atco was once exposed at ground level. They had bulldozed it all and this interesting slab of flagstone was laying there. The fish conglomerate was laying about here and there where you could pick it up by the hand full and sift it for tiny teeth. She with her short close to the ground stance and fresh eyes could really spot those itty bitty teeth too. Construction exposes it then buries it. This site had produced a number of smaller sharks teeth and some nice ptychodus. I found one of my coniasur verts there. Now I guess it's pretty much done...but we will see!!
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