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  1. I'm offering for trade about half a gallon of microfossil matrix collected from Post Oak Creek, Sherman, TX. It's rich in marine fossils from the Late Cretaceous Interior Seaway (Eagle Ford Group ~ 90 Ma). I cannot guarantee what you will find. I however can comment on what you can find based on my experience with this site. Sawfish oral teeth are very common. You may also find a variety of sharks' teeth, with about 8 genera that I've found so far in similar matrix (Squalicorax, Cretoxyrhina, Cretodus, Cretolamna, Ptychodus, Scapanorhynchus, Hybodus, Cantioscyllium, ...). Reptile teeth are unc
  2. Waited awhile to post this as I was waiting for my Christmas present to organize my findings. Trip was on 11-28-2020. Took my family of 5 plus a friend of my daughters. It was cold and raining the entire time we were there but everyone had a blast. Bought some cheap ponchos, didn’t work. Discovered that once the clay got wet and sticky it made no difference in what we were wearing. The kids ended up taking their shoes off and going barefoot. It was a mess but a lot of fun. Didn’t think microfossils would interest me but they did. Will plan another trip to see what the site looks like dry. Here
  3. ThePhysicist

    Dinosaur Bone

    From the album: Aguja Formation

    Dinosaurs have a distinct bone structure, with large and well-defined Haversian Systems/Osteons (which look like rings around holes where blood vessels used to be).
  4. ThePhysicist

    Mammal premolar (2)

    From the album: Aguja Formation

    A very small ( ~ 1 mm in length) mammal/multituberculate premolar. Indeterminate species. I unfortunately broke part of the root after this picture was taken.
  5. ThePhysicist

    Mammal premolar (1)

    From the album: Aguja Formation

    A very small ( ~ 1 mm in length) mammal/multituberculate premolar. Indeterminate species. I unfortunately broke part of the root after this picture was taken.
  6. ThePhysicist

    Amber

    From the album: Aguja Formation

    Amber is plentiful in the matrix, appearing as blood-red to orange resinous blobs.
  7. ThePhysicist

    Crocodilian tooth

    From the album: Aguja Formation

    The largest croc tooth I've found in the first batch of matrix, about 6 mm in length. Indeterminate species.
  8. ThePhysicist

    Carpet Shark tooth

    From the album: Aguja Formation

    Small shark tooth, may be Cretorectolobus.
  9. ThePhysicist

    Aguja mammal tooth?

    Found another suspected Cretaceous mammal tooth from the Aguja Fm. I've made my way to the fine matrix. This tooth is about 1 mm in length; I have no idea how I managed to find it. I unfortunately broke part of the root putting it back in the gem case I chose to store it in (after taking the pics). @jpc, what about this one? Feeling slightly more confident...
  10. Hi everyone I think I just found a new hobby With my latest fossil delivery I recieved quite a lot of microfossils & matrix vials as the world of microfossils was something that I have been long interested in. So a 2 weeks ago I finally ordered my first microfossils for which I reserved a special drawer in my archive cabinet. So here is a recapp of what I all got: 3 vials of permian material from Waurika, Oklahoma 1 vial of permian material from The red beds of Archer County, Texas 1 small vial of Conodont rich Mississippian material from the Chappel Limestone fo
  11. ThePhysicist

    Ptychotrygon sp. Oral Teeth (2)

    From the album: Post Oak Creek

    Nice array of colors. The biggest one here is the largest I've found to date at about 5 mm in its longest dimension.
  12. Beasley, C., Parvaz, D.B., Cotton, L. and Littler, K., 2020. Liberating microfossils from indurated carbonates: comparison of three disaggregation methods. Journal of Micropalaeontology, 39(2), pp.169-181. (Researchgate PDF) Version 2 of Beasley et al. (2020) Yours, Paul H.
  13. I am just wondering. Have anyone on here found microfossils from Flowerpot Shale/Formation? The age is Permian. I dug up a few kilograms of micromatrix from this formation in Woodward county, Oklahoma a couple months ago. I'll be using this topic to post any finds as time goes: although it would take me several months or years to go through it completely, depending on how busy I am. I still have three other different micromatrices to go through.
  14. ThePhysicist

    Harding Sandstone Microfossils

    Back in May or so I got my hands on some micromatrix from the Harding Sandstone, CO, USA. This formation dates back to the Ordovician: ~450-475 mya. It's chock full of some really cool and important fossils. It has some of the earliest vertebrate material, and some of the earliest steps in the evolution of teeth! I hope this is an informative and fun look into an important period in life's history. If you feel I have mischaracterized something or have left out pertinent information, please do speak up! I do also plan to post more pictures as I sort through material. If there's something specif
  15. ThePhysicist

    Harding Sandstone micromatrix (3)

    From the album: Harding Sandstone

    Magnification 40x.
  16. ThePhysicist

    Harding Sandstone micromatrix (2)

    From the album: Harding Sandstone

    A closer view of the micromatrix in the vial.
  17. ThePhysicist

    Harding Sandstone micromatrix (1)

    From the album: Harding Sandstone

    Concentrated microfossil matrix from the Harding Sandstone.
  18. So I make slides of microfossils from ~ <1mm - 2mm. I use a glue that I make with food grade gum tragacanth and water as was recommended to me when I first started. However, I have always found it a bit annoying to make, get the consistency right and keep properly, especially as I haven't been able to find any definitive guides to this. I'm wondering whether any of you use gum tragacanth as well and have a ratio/recipe/advice for me? Or if anyone has had good success (long lasting, dries clear, secure, fossil safe) with any other type of glue? Thanks!
  19. I try to identify any fossils on my own before I post it on here, that's how I learn! Anyway, I found these three shark teeth while pre-washing the matrices from Kiowa Formation (Location: Ellsworth county, Kansas. Age: Albian). A couple of them came loose during pre-washing and I found another one still in the matrix. Tooth #1: Is this tooth from Meristodonoides sp.? The views are from front and back of this tooth. Approximately 2mm long. Tooth #2: Is this also from Meristodonoides sp.? Approximately 3mm long. Tooth #3:
  20. ThePhysicist

    Micro mortoni

    From the album: Post Oak Creek

    I first identified this as P. mortoni, then Polyacrodus sp. And now that I have a full tooth of P. mortoni, I'm confident that this is P. mortoni.
  21. I have very stubborn matrices from Kiowa Formation that I am trying to break down to look for micro-fossils and fossil teeth. I have tried vinegar baths and ultrasonic cleaner to break it down quicker but it's not helping much. Anyway, I am trying the freezing and thawing cycles this time to further break it down. For the last few days, I had it soaked in water for about 24 hours and then I put it into the freezer bag to freeze it, and then thawed it out after overnight. Before freezing, should I add extra water into the bag or are the matrices being damp good enough? Are there more efficient
  22. erose

    Coin "Jar" Source

    I'm in need of some of those small round coin "jars" that have the foam inserts. I don't have a lot of micros to display but I want to buy these in some reasonable quantity such as 50 to 100. I may not be searching with the proper name because I am having a hard time finding them online. Would someone share with me their source(s)? Thanks in advance, ER
  23. Help request! I am putting together a tool for judging rock age based on very crude, whole-rock, hand-sample observations of fossil faunas/floras -- the types of observations a child or beginner could successfully make. I view this as a complement to the very fine, species-level identifications commonly employed as index fossils for individual stages, biozones, etc. Attached is what I've got so far, but I can clearly use help with corals, mollusks, plants, vertebrates, ichnofossils, and the post-Paleozoic In the attached file, vibrant orange indicates times in earth history to com
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