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Found 33 results

  1. Texas micro shark teeth

    Micro fossils from the pecan gap right where it meets Austin chalk, shark teeth with the roots dissolved are common here, as are baculites, if you see something you know or want to know more about say.
  2. Creek was a little flooded today made it harder to navigate, started the day with 2 dead drill battery's that I had charged the night before so I decided to move father up to look at some different exposures, started by picking up some matrix for micro's from the bottom of the pecan gap, more on that later, and then some Del Rio clay for the same, (if someone has suggestions for how to wash this faster that would be great) spent the next 2 hours picking up heteromorph mariellas.
  3. Micro trilobite

    I don't know whether to laugh or cry on this one. Found an enrolled Trilobite in my micro matrix. Gave it a nice spa treatment of hydrogen peroxide & got most of the matrix off. And then took a look at it with my dino lite & found that it has almost no head. Thing is maybe 3.5 mm across and the one thing I didn't actually expect to find. No idea if it can even be identified now, but here's the pics anyway. Pics are 45 x magnification. Jasper Creek Formation. Late Pennsylvanian.
  4. Micro shell?

    I recently bought some microfossil matrix from the Jasper Creek formation in Bridgeport Texas. Found lots of crinoid stem pieces, some about as big around as the lead from a mechanical pencil, lots of sponge pieces & quite a few Girtyocoelia Sponge ball and chain sponges. I also found what I think is a complete shell, but I'm not sure. Everything else is a tan color, but this is more of a brown & black. When putting it in hydrogen peroxide to try to clean some of the left over matrix of, it floated. So I looked at it with my DinoLite & took some pics of it. Both sides have 2 shots showing different levels & the "hinge" area. It's .5 cm at the widest. 50x magnification.
  5. Campanian microfossils

    Hi everyone! It would be amazing if any of you could help with identifying some marine microfossils I sieved. The origin is campanian (might be santonian) marine sediments. The location has yielded mosasaurs, fish, and sharks in abundance. But I have a few bone fragments that I have absolutely no clue what they are... Here are some of the mysteries:
  6. So I had bought from a certain online auction site some Lee Creek mine microfossil matrix a while back... I finally got around to looking over a little bit of it this evening. Attached are what I have found so far without any magnification.
  7. What is this seed looking fossil?

    Can you help me identify this fossil? Late Miocene/Miocene, Phillipines, Camarines Norte
  8. Fish Scale?

    Is this a fish scale? It was found in the Woodbine formation south of Denton, TX. I am new to microfossils. It may also be a small clam.
  9. I was out hunting near Spring Valley, Minnesota with @Bev and @minnbuckeye the last couple of days. As always, I was looking for coprolites. Mike came across this first piece, sitting loose in a piece of weathered matrix. While we were splitting rocks, we found a virgin layer of the source matrix. When we got back to Bev's fossil barn (everyone should have one), I took a peak under the microscope at two of the loose, irregular objects but couldn't really see much because of the powdery iron oxide coating. When I lightly rinsed them, they revealed these microscopic (calcareous) jack-shaped objects. Similar inclusions were in both objects loose objects. You can see from the broken spine on the inclusion in the lower right that they are hollow. In the other loose piece and those still embedded in the matrix, I can also see random straw-like spines of the same material. I'm not sure if these are coprolites, algal masses or something else. I have seen coprolites covered in powdery iron oxide before. Eventually I would like to free more of these from the matrix so that I can sacrifice one to get a look at the interior. Can anyone identify the little jack-shaped inclusions? The spines may have been quite a bit longer. The only things I can think of are forams or perhaps diatoms. Bev and Mike - What was the name of that cliff again? Decorah Shale? @Carl
  10. Any chance someone knows what these are? They are most probably Holocene-aged (last 12,000 years). They come from a dry playa lake setting (inland) in India - the Thar Desert. Size is about 1mm wide, and 1.5+mm long... there is a funny raised hollow insert. Would love to get some tips!
  11. Microfossil finds

    Hi all, I just got the studio equipped with a digital microscope, and I've been enjoying looking through the sediments of fossil prep work. I'm finding a lot of micro crystals, and other forms that seem like pollen, or microscopic life I also found 2 insects, which I'm not sure of their origin, they could be contamination from the room, but I'm fairly certain this batch came from caked-on sediments at the bottom of my sample container.
  12. Where to buy compartment slides?

    HI all, You know those neat microscope slide sized microfossil containers with partitions inside to hold dozens of little fossils? I think they are covered with glass too and have a black background. Where would I buy such a thing? or is it easy to make them? Your thoughts?
  13. Ostracods - unshaven

    Apparently not all Ostracods shave in the morning Subrecent, Mauritanian Shelf
  14. strange markings on cylindrical object

    This came from Walnut Creek in Austin, Texas
  15. Hi I hope someone can help me with this! I found these two very small fossils when wet sieving lower lias shell bed. They are about 2mm in size and look a bit like a cross between a crinoid and a bone-like substance. They are so small they were very hard to photograph even using the super-macro function on my camera but hopefully they are good enough for somebody to perhaps recognise what these are? I'd be very grateful as I am mighty curious! Thanks in advance. Sam
  16. Most of my fossil collecting has been Invertebrate Macrofossil collecting. Very little attention has been made to the little fossils. It is always a good idea to expand your knowledge, leave your comfort zone, go somewhere you have never been before. I find that not paying much attention to Microfossils has been a mistake. So when I saw an interesting Nummulites fossil slab for sale; I chose to purchase it. The rough cut specimen looked like it could reveal more, with a little attention. What I chose to do is give it a good high luster lap polish to see the results. So much more detail was made. Where my specimen came from was Northern Spain, in or near the Pyrenees Mtns. near Aragon. The seller didn't give much info and what he did give was in Spanish. Chasing information down on the internet I found the mixed fossils were Nummulites sp. (large ones) and Alveolina sp. (smaller ones) I have some photos of my results to share. Before polishing it looked like this: After polishing the fossils clarified, here are some closeups: Apparently these fossils are common in Spain, neighboring France and other places in the world. This is an old engraving: In Spain, the Limestone the Nummulites are in, is used as building materials like blocks, steps, pavers. I will need to do more studying of these neat looking spiral tests.
  17. Pennsylvanian Foraminifera?

    I have found quite a number of these ranging from 1-4 mm or so. They are from the Kansas City Group of the Pennsylvanian Subsystem. I don't know the name of the strata, but for the locals, these come from the road cut about 1/4 mile west of I-49 on Route 150 near Belton, MO. I have found them in large (three to six inch) nodules. I will appreciate any help you can give me with identification? Russ
  18. What are these tiny fossils?

    I could use some help with the ID for these tiny fossils. I found them in the Pennsylvanian Subsystem, the Kansas City Group, at the top of the Winterset L.S. Member and at another site in the Kansas City Group that I cannot identify (I don’t know what it is). Most of the specimens I have found were in fist-size nodules of tan/yellowish limestone. These specimens are all around 1 cm in size and the tiny nodes/spines are 1 mm or so. After having seen dozens of these specimens, I have observed that most of them consist of a round disc about 1 cm in size with the tiny “spines” pointing towards the center. Picture #3, however, shows one that is elongated rather than round. In picture #2 I have circled the specimen with the "cap" still covering most of the spines in black and circled some of the exposed spines in blue. In picture #5 I circled and area that contains the "cap" under which are the "spines". I took these photos with my point and shoot camera on a tripod and my 10x loupe held against the lense. It works surprisingly well, yet as you can tell the pictures vary in quality and are hard to focus. I use a photo editor to crop the pictures so the images you see below are about 1/10 the area of the originals. Any tips you can give me on getting better pictures of tiny fossils will be appreciated. I look forward to any help you can give me. Russ
  19. its been days I am looking for a good way to make a complete image of thin section, so we can have a very big picture but very useful for some tasks. actually I need to make an image processing software then process thins sections automatically. I know pretty much about software part. but still got problems for making very good image. 1- I tried very high DPI scanner and the results were simply not acceptable as we have very small microstructures inside some microfossils. the image is below: 2- I tried making lots of images with camera on microscope then stitch images together. the result is pretty good but changing position of thin section and capture image takes lots of time still we have stitching time too. this is the result: 3- I know we have some special devices for these cases but they are very high price and mostly suitable for universities not for personal uses 4- anyway maybe the only option is making a little machine that can automatically move the thin section on the microscope stage then automatically capture photo. so any suggestions guys? if something is not clear please answer. thanks
  20. Hi all, Here is another fun find from Sacha's Merritt Island matrix. As usual, I don't have a clue as to what kind of tooth it is (or maybe it's a claw?). The area around the base of the tooth reminds me of something you'd see at the base of an antler. Sorry parts of the specimen are a little blurry in the photo. It was hard to decide what part to focus on. I looked up every carnivore I could think of and came up with nada. Any help would be greatly appreciated! As a side note, I would like to extend a special thanks to Julianna, Marco Sr, Tony, and PA Fossil Finder for posting all your wonderful photos. It is super helpful!
  21. Scale in photo is in mm. I'm thinking this may be a Ptychotrygon triangularis tooth. MIGHT be Ptychotrygon hooveri, but it looks to me to be a closer match to the triangularis. One of my latest finds while sifting through my load of gravel from Post Oak Creek.
  22. 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.
  23. I collected some micro-matrix gravel while hunting a site in the Peace River that had a good abundance of mammal fossils. My hope was that there would be some micro mammal fossils as well. I seemed to have guessed correctly as I turned up this nano molar which I assume is rodent based the size (~1.7 mm diameter across the occlusal surface x 2.7 maximum height to the end of the one remaining root). I tried to get a clear image of the occlusal surface but believe me something this small is hard to hold and keep in the focal plane. Would be interesting to see if Rich or any of the others who might know their tiny mammals can make an ID on this little speck of a fossil. -Ken
  24. This is my first "new topic" post to the FF, so I hope I'm doing this correctly. If you have a microscope or equivalent and a current or potential interest in micro-fossils, you might enjoy collecting at the following historic locality: Mississippian Salem Limestone, about 5 miles east of Salem, Indiana off Rt. 160; Spergen (Spurgeon) Hill, railroad cut (Manon RR) paralleling S. Harristown Rd, 0.75 mi north of Rt. 160; south end of Trackside Road; approximately 140 meters S of Harristown, Washington Co., Indiana; diminuitive fauna; Universal Transverse Mercator (UTM) coordinates: 16S 585024.04 4272332.25. My first introduction to micro-fossils was in a paleontology lab I took during the 70’s with the focus of study on the foraminiferid, Endothyra baileyi (now called Globoendothyra baileyi). These tiny specimens were labeled “Spergen Hill” on their container without further description. A few years later, I was able to locate the source of the specimens as the type locality for the Salem Limestone (formerly, Spergen or Spergen Hill Limestone) of Middle Mississippian or Meramecean (Valmeyerian) age. Sratigraphically, it sits above the Harrodsburg Limestone and beneath the St. Louis Limestone. The locality is a railroad cut at Spergen Hill, just south of Harristown, Washington County, Indiana. The cut is relatively narrow and much caution is advised upon the advent of trains entering the cut. The rock at this locality is a medium to coarse grained, tan to gray, crossbedded calcarenite containing mostly microfossils. Macrofossils (somewhat sparse) are present in the formation but nowhere near the quantity of the microfossils (G. baileyi has been estimated at 1,000 / in3 in some portions of the strata). Besides single-celled eukaryotes (e.g., Globoendothyra), representatives of most of the major phyla are present in diminuitive form or as tiny fragments of the macro fauna (spines, plates, columnals, etc.) I’ve visited the location at least three times in the past and besides collecting macrofossils on these visits, I have also accumulated a quantity of the rock containing the microfossils. On arriving home, I pulverize the collected rock with a sledge to a fine granular size and wash and strain the residue through a porous cloth to remove any extra fine material (rock dust) The washed residue is then dried and placed in labeled plastic bags. Then, in the dead of winter when collecting is not possible for me and the “urge” to collect is compelling, I drag out a bag, place some of the residue in a shallow container under my scope and go fossil collecting and identifying! I use a very fine-pointed forceps, which I periodically ground to a piece of rubber (to avoid static electricity buildup) to pick out fossils from the residue. I find it a bit better for collecting the micros from this locality than using a wetted fine paintbrush. This location has been estimated to contain over 100 species of invertebrates on a micro level. More information can be found at http://www.fallsoftheohio.org/SalemMicrofossils.html. The attached photos were taken for a program I was giving on Indiana fossils to illustrate single-celled eukaryotes (Protozoa). The first photo shows a random selection of micro-specimens of various phyla collected from the residue with an emphasis on the G. baileyi. The second and third show sorted G. baileyi specimens and G. baileyi specimens with matrix, respectively. Two free texts with plates are available on some of the Spergen Hill microfauna at the following websites: Whitfield, R.P. On the fauna of the Lower Carboniferous limestones of Spergen Hill, Ind., with a revision of the descriptions of its fossils hitherto published, and illustrations of the species from the original type series. Bulletin of the AMNH; v. 1, article 5. (free download) https://books.google.com/books?id=ebYPAAAAIAAJ&pg=PA241&lpg=PA241&dq=whitfield,+R.P.+On+the+fauna+of+the+limestones+of+Spergen+Hill&source=bl&ots=iFhHvpc7qf&sig=XNpUBo45hKPRICv5fLdb0AlJktA&hl=en&sa=X&ei=pO8_Ve70G-vlsATq-4EQ&ved=0CCQQ6AEwAg Cumings, E.R. et al. Fauna of the Salem Limestone of Indiana. (free download). https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB4QFjAA&url=https%3A%2F%2Fscholarworks.iu.edu%2Fdspace%2Fhandle%2F2022%2F12889&ei=G_o_Va3_CveasQSCu4HADA&usg=AFQjCNGsTNbr2RKBBebd6bnuISOcqvMsPw
  25. Thank you, sixgill pete, for the small USPS box of fine Lee Creek Mine matrix from North Carolina. This was my second batch of Lee Creek matrial (the first from jcbshark), and I was hoping to fill in some gaps in the species in my Lee Creek Mine collection. This material delivered, and I was able to add several species to my "got it" list Here are my best guess at IDs for some of the better specimens found. There is some overlap from this batch and the previous batch. As always, corrections to any IDs are welcome. IDing was done using elasmo.com, aurorafossilmuseum.com, fossilguy.com, several TFF member posts about Lee Creek and North Carolina (brachiomyback and MarcoSr) and the two Geological Survey Papers "Mollusca from the Miocene and Lower Pliocene of Virginia and North Carolina: Scaphopoda and Gastropoda" and "Mollusca from the Miocene and Lower Pliocene of Virginia and North Carolina: Pelecypoda" Scaphopoda and Gastropoda 1) 2) 3) 4) 5) 1) Arene pergemma 2) Mitrella lunata 3) Turritella alticostata 4) Dentalium carolinense 5) Gastropod internal cast Pelecypoda 6) 7) 8) 9) 10) 11) 6) Mulinia congesta 7) Glans tridentata decemcostata 8) Astarte sp. 9) Mysella sp. 10) Plicatula marginata 11) Discradisca lugubris Rays and Sharks 12) 13) 14) 15) 16) 12) Dasyatis sp. 13) Ray barb 14) Carcharinhus sp. 15) Carcharias sp. 16) Hemipristis curvatus 17) 18) 19) 17) Galeocerdo aduncus? 18) Isurus sp.? 19) Hemipristis sp.? Fish 20) 21) 22) 23) 24) 20) Chilomycterus sp. 21) Pogonias sp. 22 - 24) Sparidae sp. Other 25) 26) 27) 28) 29) 25) Balanus sp. 26) Coprolite 27) Crab claw 28) Echinoid spine 29) Echinoid test Puzzlers? 30) 31) 32) 33) 30) Dophin tooth? 31) This was joined together like a zipper when I found it, but it has since separated? 32) It is symetrical, the reverse looks the same, almost arrowhead shaped, but looks natural and bone-like. 33) Sand dollar internal structure?