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  1. minnbuckeye

    Mississippian Rugosa Coral to ID

    A new coral was found when geode hunting in NE Missouri. Likely Warsaw Formation, maybe Keokuk. In either case it is Mississippian. I am leaning towards an ID of Acrocyathus floriformis, a colonial rugosa known to occur in the Mississippian. But I prefer that coral experts chime in before I label it!!! @TqB Thanks Mike
  2. RKLMB

    Rogers City, MI

    Please help to identify. Not convinced it is horn coral. Looks like a colony of rugosa but what kind?
  3. SilurianSalamander

    Horn coral or bryozoan colony?

    Found in landscaping gravel at a gas station on a 6.5 hour drive to Lake Huron for some fossil hunting. This is probably Devonian. Instinct tells me horn coral but it looks rougher than that and lacks visible septa at the top. Bryozoan colony? That’s my next best guess. Thanks! Love you guys.
  4. Hello everyone! I want to tell you about a trip to a stream in a snow-covered park. I took my three-year-old daughter (who has already helped me search for fossils) on a trip. Konkovsky or Stone stream is located on the territory of the Bitsevsky Forest Park (the southern outskirts of Moscow), I had information (https://www.ammonit.ru/foto/61829.htm ) that carboniferous rocks accessible as a result of glaciations (quaternary moraine deposits) can be found there. The temperature on the day of the trip was -2...- 5oC (28...25oF) with a very unpleasant cold wind at a speed of 6 m/s
  5. Tammy and I made our first post-pandemic roadtrip and we went to Chicago to see family. Decided to drive as I was not yet comfortable with airports and airplanes. I had hoped to visit a site in southern Illinois where blastoids used to be plentiful and easy to find. Sadly, that site was mistreated and is no longer available. Members here on the forum suggested several alternatives which should produce the blastoids that I longed to hunt for. We found that the large (and well known) roadcut just north of Sulphur, Indiana was along the route (kind of) on our return trip and so it was added to t
  6. Bill Hoddson

    First Serious Prep

    This is going to be my first serious attempt at removing a fossil from a rock, and cleaning it for display. It's a solitary horn coral found in a parking lot in Traverse City, Michigan. Base rock is a rather coarse grained limestone, so it should be easier that a finer, densely grained matrix. The only tools I have currently are a Dremel with a flex attachment, carbide cutting disks and diamond burrs, as well as various dental tools and muriatic acid. My plan is to try to safely cut the specimen out of the main body of the rock, and then proceed with th
  7. Ralenka

    Id help - coral rugosa?

    Found these at Salt Point beach of Cayuga lake. Are these rugosa corals? The length range is from 0.5 cm to 2.5 cm. Thank you!
  8. Cross-section, specimen 50mm in diameter. Marcellus shale south side of Stroudsburg, PA. Collected in 2007
  9. On July 1st, 2021, I went for the first time to a public, personal site and was very pleased with the results of my fossil excursion. The locale consists of several exposed formations, namely the Liberty formation I was hunting in. In my region of southwestern Ohio, that's known to be one of the best fossil-hunting formations due to its remarkable preservation of particularly fragile Ordovician life, even when compared to the excellent fossil preservation quality of other formations in the area. The thirty-three degrees Celsius heat was rather hot by itself, and as the sun's rays
  10. BRADAI M.

    Upper Devonian Rugosa ID

    Hello guys I collected this Rugosa coral from the Upper Devonian of Charouine, located in the Ougarta ranges, Algeria. I wonder if someone can help ID the genus and species properly! I appreciate your efforts.
  11. Crankyjob21

    Some really cool fossils from my land!

    My collection of some really cool fossils on the land most of the fossils I have in my collection are bought so it’s always nice to find something actually in the field. Now my main goal with this post is to try to identify the trilobite I found today although it only has the head piece, it clearly shows the eye and part of the gabella. The horn coral which are the sort of conical fossils should help identify the age of the rocks. if anyone else can give an ID on the rest of the fossils that would help thanks. By the way these were all found in Dane County, Wisconsin. (PS) I have no clue what
  12. Tidgy's Dad

    Boy, 6, Finds Horn Coral in Garden.

    https://www.bbc.com/news/uk-england-birmingham-56554925 I have no idea what that coin is.
  13. IsaacTheFossilMan

    UK Convex Spherical Structure (marine)

    Heya! This is a spherical convex structure found in the South of the England. Unfortunately, as I found it when I was very little, I cannot seem to recall the exact location, and, thus, the age. Originally, as a child, I crudely assumed it to be a mushroom... Ah, the wonders of child's minds... More recently, I conducted a study upon it, and, due to the septa and mouth-like crystalline structure at the top, I identified it as a polyp cup of a Rugosa coral. However, I am still unsure as to what it is. Any input would be greatly appreciated, cheers!
  14. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    This young, possibly ephebic, corallite had a very deep attachment area on bottom. This rapid upward growth may have occurred in response to—you guessed it: Sinking in the mud.
  15. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    The next few images will show some of the many growth forms of Gymnophyllum wardi, a solitary rugose button coral. G. wardi is the only known species of the genus. It is locally common in the Middle Pennsylvanian (Westphalian) Wewoka Formation in Okmulgee County Oklahoma. Fossils of the species also occur in the lower part of the Labette Shale in Rogers County Oklahoma. The tiny corallite in this image displays many characteristics of the early, neanic, stage of growth, including crooked septa and a deep central pit.
  16. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    This tiny Gymnophyllum wardi corallite shows neanic characteristics, including long septa that extend from the center of the calyx to the periphery. Also, at the center of the bottom side, you can see the small area where the corallite attached to the mud in shallow, calm seas where these corals are believed to have lived.
  17. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    This Gymnophyllum wardi corallite exhibits characteristics associated with the ephebic (maturing, or nearly mature) stage of growth. For instance, note the beginnings of a central dome on top.
  18. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    The Gymnophyllum wardi corallite in this photo shows various ephebic characteristics, such as the insertion of minor septa between the central dome and the periphery.
  19. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    This likely ephebic corallite of Gymnophyllum wardi displays the notched septal ends that are often seen in this species.
  20. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    This specimen of Gymnophyllum wardi appears to be mature, having a broad, smooth central dome on top and fused septa that are visible mainly near the periphery. This species grew by spreading horizontally, a process that often left conspicuous growth lines on the bottom surface of the corallite.
  21. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    This mature Gymnophyllum wardi corallite looks like a pie crust due to the prominent central dome, fused septal ends, and the three apparent wounds on top. Fusing of the septa served to increase the surface area of the base. This may have kept corallites from sinking in soft mud.
  22. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    Some mature specimens of Gymnophyllum wardi had low, flat tops. Again, note the fusing of some (but not all) of the septa near the periphery. Also see the prominent growth lines on the bottom surface.
  23. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    The growth lines on the bottom surface of this mature specimen give the appearance of several corallites stacked one upon the other. This pattern is often seen in Gymnophyllum wardi and may indicate sequences of regenerative events.
  24. From the album: Pennsylvanian Fossils of Northeast Oklahoma

    This mature specimen of Gymnophyllum wardi has very thick growth lines on the bottom surface.
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