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Hello everyone! While I was cleaning out my phone I forgot I had these finds that I would like second opinions on identifying from Post Oak Creek near Sherman, Texas. I found these right before I had to fly out to Iceland so the setup is very messy and was done quickly. I love hunting here, and have a general understanding on most of my finds there which are mostly various shark teeth and lopha oysters. Usually confident in identifying however I never got to go to school for paleontology so I’m still an amateur! Im always so eager to love to learn more about the ancient Cretaceous sea life even if it can’t be my profession. Here is the layout! Sorry again it’s so messy! I spilled water. (Ballpoint pen and cavendish banan for reference) ……………….. I found a LOT of Ptychodus whipplei that day! I was super happy as this is my *favorite* shark. I came mostly looking for these babies so my attention was focused on searching the gravel for these shapes specifically. Anything else I found was a happy mistake. Never found so many in one trip! Just showing these off really quick! Hopefully they make someone here smile! What is the one I have labeled 13?! Never seen it before! I also found some goblin sharks, squalicorax, and psuedocorax. ………………. I would like help IDing these mammal looking parts! I understand that there’s probably a bunch of pig and horse farm animals locally that have died… but I wanted to ask about these! I think the long orange one is from a horse(?) that was split in half and not sure what the other bones are from. They feel a little in the lighter side but feel weighty and “stone” enough to be possibly fossilized. I have no idea how to ID what a mammal bone is except teeth! I also think I found the TINIEST arrowhead ever! At first I thought the triangle shape was just a coincidence of a chert fracture but look-there’s chisel marks! Maybe a stone tool that the very tip broken off. Either way I’m glad I kept it! M1 pig bone? M2 ??? Mammal tooth M3 horse tooth? M4 arrowhead tip!? *hopefully* these are enough pictures to help ID these four! So neat to find mammal remains as Ive only found both devonian & cretaceous marine fossils in my life. ……………….. Mystery Swirl! I find this specimen’s shape intriguing. It looks like an internal mold of a snail but looks swirly and not perfectly tube shaped as a snail would stike me as- it looks like a little like a poop! Wondering if this is snail mold or possible coprolite! It doesn’t look straight and as “segmenty” in clumped wads as my shark coprolite from NSR I had ID’d. Im leaning towards snail. I just love that it looks like do-do. ……………….. I would also love having help ID these Cretaceous finds! Im a familiar amateur with the local Cretaceous stuff but not an expert. I would love to be educated to ID specific species of sharks to help local people I meet here ID their finds! ……………….. I found 2 interesting fishy looking teeth! Thanks to this forum I found a jaw of Enchodus back at NSR a while ago, this little one reminded me of that! I found this longer looking tooth that I have no idea if its a marine reptile or fish! It’s long and skinny with long striations all around it and round all around. The tip is broken. **Would LOVE to know if theres a trick to instantly knowing a fish tooth from a marine reptile tooth. I think I read on another thread a while back that one of them lacks a layer of something in the enamel but I’m probably wrong. F tooth 1- teenie Enchodus? F tooth 2- saw shark ? ……………….. Need help with P 13. It reminds me a little of a ptychodus tooth but I couldn’t find anything in the pinned ptychodus ID thread that looked like it. Maybe a worn P. Mortoni , but maybe possible it could be something else entirely! Check the first 2 photos I posted for size ref and more photos of it. I regret not taking a pic of the back. I know most of my ptychodus are P. whipplei (the common ptychodus to find at Post Oak!) but the others after P11 are new finds to me and not in any of my favorite references. ……………….. Lastly- would like to know if these are cretolamna or leptostyrax and how to easily ID the two! I use the fossils of texas book as a reference and some of them look so similar its hard to tell them apart for me. I usually find mostly the common but awesome goblin shark teeth (scapanorhynchus) but every once and a while I find some that look like these. Im leaning towards a bunch of them being cretolamna. *might be a few broken or worn goblin shark mixed in here Thanks for taking the time to read all of this! I hope the pictures were enjoyable! Id absolutely love to learn more about Cretaceous marine life when I get back to Texas from Iceland. (I went to the Heard museum and Perot right before I left!) ** Additional photo of arrowhead looking piece that uploaded out of order: ***Bonus pictures from that day! I can assure you this area is not totally picked over I found these near the Bridge as shown in the photo.

I've been wanting to check out some of the construction sites in Eagle Ford areas in north Texas, but most of those are well north of Dallas. I'm 60 miles southeast of Dallas, so I'm not often willing to drive that far to scout sites, most of which probably won't have anything anyway. But yesterday, I had a doctor's appointment in Dallas, plus needed to make a shopping stop in north Dallas, so I decided to do a little scouting further north. It was to be just scouting, and I wasn't dressed for any actual fossil hunting. I had on shorts and sandals, and didn't even bring my hat. But, don't you know it, I brought home fossils. One of the construction sites was on a hillside, so the grading done to level it went deeper there, and I stopped to walk a little of it. I found a rock that just looked like a piece of concrete, but I've learned that some of the Eagle Ford fossiferous matrix looks a lot like concrete, so I routinely waste a lot of time picking up concrete pieces. There were no visible fossils in this rock, but when I turned it over, it looked like gray sandstone on the other side. That told me it wasn't concrete, and every time I saw another rock that looked like it, I picked it up. Sure enough, one of the rocks had a small tooth so close to the surface, I was able to pluck it off the rock with my fingernail. Here is that tooth.