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  1. Dimitar

    Silurian or Devonian

    Hello guys! Please assist for dating of such rocks. I suspect it is Silurian, but it could be also later Devonian. I find plenty of these here like pieces of rocks. Gray-blue - in color, very hard. It is lile a cement, but harder than cement. And it has lot of organic materials inside - mostli marine plants or animal. The diameter of the stems is 3-4 cm and more. N.1 N.2 N.3 N.4 N.5 N.6 N.7 N.8 N.9 N.10 - here we see some small brachiopod N.11
  2. Found between Montreal and Laval, Lac du Preries, on the south shore of it. Dating: late Ordovician or Silurian. possible: Phylactolaemata Plumatellida Please confirm if this is the case here ? I am withut experience in this field. N.1 - the stem N.2 - stem and branches N.3 - root and stems N.4 dimensions N.5 - bottom view N.6 - liphophore - and flowers around it N.7 - animal structure N.8 - animal details structure N.9
  3. Mainefossils

    Silurian Fish Remains

    I wanted to start this thread on the identification and discussion of silurian fish remains. I have been learning a lot about this subject, and hope to share my own finds and discoveries with you. I also hope that this thread will not only include my finds, but finds of all members of the Fossil Forum who have such materials, so that we may share our knowledge on these amazing fish. Some of our members( @jdp, ... ) are quite knowledgable on such finds, and I am looking forward to working with you guys more. On each post, please include size, stratigraphic data, and taxonomy, if known. I look forward to seeing your specimens.
  4. Rock-Guy-17

    Trace Fossil ID from Western New York

    I found a few plates of sandstone that I really liked a few years back in Lockport, NY. I believe they are from the Silurian Grimsby formation. I don't remember nearly anything about trace fossils. My first guess from just googling before making this post was arthrophycus. Can anyone tell me what kind of trace fossil is present in these pieces? 1. 2. 3. 4.
  5. Mainefossils

    Actinopteria bella

    Actinopteria bella is a species of bivalve found in the Leighton/Pembroke Fm, and first described by Henry S. Williams. It is differentiated from A. fornicata by less convexity in its shell and a wider beak. It is differentiated from A. dispar by its shorter shell. The above pictures are of the left valve. A poorly preserved original or cast of the shell exterior is on the left side. Some of the exterior of the shell may be missing since the exterior ribs have less than normal height. The right photo is an exterior impression or mold. Some of the shell may be present on the right side of the photo. Williams, Henry Shaler (1913). "New species of Silurian fossils from the Edmunds and Pembroke Formations of Washington County, Maine." Proceedings U.S. National Museum, 45, 319-358. https://repository.si.edu/bitstream/handle/10088/14399/1/USNMP-45_1985_1913.pdf Maine Geological Survey (2009). Virtual Tour of Maine's Fossils. https://digitalmaine.com/cgi/viewcontent.cgi?article=1575&context=mgs_publications
  6. Mainefossils

    Brachiopod id

    This is another fossil from the Silurian Leighton Fm, Maine. It is an excellently preserved internal and external mold of a brachiopod. It is similar to the Salopina species that I am constantly finding in this formation, but this brachiopod's valve is more strongly curved, instead of almost flat. It also has less numerous striae, and they almost reach the median process. As well as this, the dental plate is thinner and curves inward more strongly, and the ctenophoridium is wider. Any help on its identification would be greatly appreciated. Here are some pictures of it (internal mold on the left, external on the right):
  7. Mainefossils

    Chonetes bastini

    Chonetes bastini was first described from the Leighton Fm, also called the Pembroke Fm. It is differentiated from other species by the number of spines and its finer more numerous striae. Most specimens are missing the hinge spines. The above pictures show the pedicle valve. A poorly preserved original or cast of the shell exterior is in the left side photo. Some of the exterior of the shell may be missing since there is a horizontal groove above the shell where shell may have once filled it. The right photo shows an exterior impression or mold. Williams, Henry Shaler (1985). "New species of Silurian fossils from the Edmunds and Pembroke Formations of Washington County, Maine." Proceedings U.S. National Museum, 45, 319-358. https://repository.si.edu/bitstream/handle/10088/14399/1/USNMP-45_1985_1913.pdf
  8. Hello, I'd appreciate your help with this one. I found this one at a Lake Michigan beach in Illinois. Silurian from the Racine formation. I believe it's a sponge or demosponge. Thinking the white dots on the vertical growth are pores, and the admittedly terrible microscopic photo of a small area on top of the rock shows some of its openings. Some of these seem to be filled with minerals that make them look like bumps, many others aren't preserved well at all, just show as faded round dots. Am I way off on this? TIA, Pippa
  9. Kane

    Calymene clavicula

    From the album: Trilobites

    From the Arbuckle Mtns, Oklahoma.
  10. Nautiloid

    Unidentified tiny fossils

    From the album: Nautiloid’s Eurypterids and other Silurian fossils

    Unidentified fossils that could be ostracods Upper Silurian Bertie Group Fiddlers Green Formation Phelps Member

    © Owen Yonkin 2020

  11. Mainefossils

    Gnathasome fish scales

    Fossil forum, I have just finished uncovering a gnathasome fish scale. It is from the Leighton Fm, Maine. I believe it to be in the genus Gomphoncus, maybe even Gomphoncus sandelenis, which was described as being in the Eastport Formation (https://www.erudit.org/fr/revues/ageo/2018-v54-ageo04224/1055415ar.pdf). I am unsure of this id though, mainly because of the pit in the largest end of the scale. It is approximately 200 microns long by 250 microns wide by 200 microns deep. Any help on the id of the genus, or maybe even the species, would be greatly appreciated. Here are some pictures of it:
  12. aek

    Snow thaw

    I needed to get out of the house for a few hours and so went to try my luck at finding some local Silurian fossils. First outing of the year. My first best find was this crinoid which I believe is a Eucalyptocrinites crassus calyx. A good size. On the reverse side is a small Encrinurus egani. This next find I was pretty excited about. A large D. platycaudus cephalon. I took it home to prep... Unfortunately, the preservation was not ideal, but that's the way the cookie crumbles. I placed a nicer example next to it that I found last year for comparison. 7cm across. Thanks for looking.
  13. Mainefossils

    Lingulid brachiopod id

    Fossil forum, This is another specimen from the Leighton Fm. I had two possibilities, Lingula scobina and L. lewisii, which I found mentioned in this paper https://repository.si.edu/bitstream/handle/10088/14399/1/USNMP-45_1985_1913.pdf, and which I further researched. The main problems I have with these two species are that L. scobina has different surface sculpture, and L. lewisii is an English species. Any further guidance or suggestions? Here are some pictures of it (internal mold on the left, external on the right):
  14. EscarpmentMary

    Eurypterid

    I was working at my desk today when one of my fossils caught my eye. I picked it up and thought that looks like a Tully Monster, but a quick check on the internet and I realized too small and not my geological time period, the Tullimonstrum belongs in the Pennsylvanian period. 300 million years ago, too young, there you go Illinois US. So I’m thinking a part of Eurypterid, or sea scorpion, they were around during theSilurian. What do you all think?
  15. Mainefossils

    Unknown fossil

    Fossil forum, I recently found an interesting fossil. I was thinking coral or bryozoan, but was unable to identify it correctly. It is from the Leighton Fm Maine (again), which is Silurian. Any help would be greatly appreciated. Here are some pictures of it:
  16. Mainefossils

    Brachiopod ID

    Fossil Forum, I recently found multiple brachiopods that I believe are in the genus Salopina, moved from Orthis, and of the same species. I found them in the Leighton Fm, Maine, which is Silurian. I was wondering if anyone could tell me what the species was, and also if anyone had any literature on this genus. Here are some pictures of them (internal molds are on the left, external on the right):
  17. oilshale

    Inopinatella sp.

    Literature: Tinn, O. et al. (2009): Thallophytic algal flora from a new Silurian Lagersttte. Estonian Journal of Earth Sciences, 2009, 58, 1, 3842
  18. BeforeDinosaurs

    Getting Started In Southeast Wisconsin

    I'm excited to get into fossil collecting, but before I spend money on gear, I'd like to be able to make an informed decision. The fossils I'd be collecting are from the Silurian age Racine Dolomite. I know that Estwing tools are generally considered the best, but other than that, I am completely unsure as to which hammers and chisels would be most appropriate for breaking these apparently very hard rocks, or even how to go about using them. I know a spot on a friend's property (by the Milwaukee River) where there are a bunch of Silurian rocks piled up, so I don't think access will be a huge problem. Still, info about good sites would be welcome. Thanks.
  19. From the album: The Waldron Shale

    Wonderful specimen of the brachiopod Meristina maria, Hall. Conspicuous in the Waldron, specimens retaining all the shell material an fully inflated are not commonly collected. Specimen measures 1.25" in length.
  20. Ken K

    Calymene brevicepsIMG_4200.jpg

    From the album: The Waldron Shale

  21. From the album: The Waldron Shale

    Featured is a beautiful specimen of Calymene breviceps from the Waldron Shale. Despite this species being a somewhat common trilobite of the Waldron Shale, specimens of this quality are hard to come by. Specimen is 1" on matrix measuring 3.5" x 4.5". Collected and Prepared by Ken Karns.
  22. From the album: The Waldron Shale

    Plate with two specimens of the Crinoid Eucalyptocrinites elrodi (Hall). Plate measures 10" x 7" with crowns measuring approx. 2.5" in length. Specimens of this quality are exceedingly rare in the Waldron. Note the one specimen complete with root system.
  23. aek

    Silurian trilobite

    Any ideas on this partial lichid? Sugar run formation. Measures about a cm. Also on the fence on the other cephalon. Proetid? Thanks for any help.
  24. locutus9

    Silurian Fossil Needs ID

    This is a fossil I collected at the Long Pond Road Site along the Erie Canal in Greece, New York. It is from the middle Silurian Rochester shale. Some interesting perpendicular lines can be seen along the edge of it. I have looked for other fossils similar to this one and have found nothing. The American dime is 1.8cm in diameter.
  25. locutus9

    Silurian Invertebrate Needs ID

    These are two fossils of the same species collected at the Long Pond Road Site along the Erie Canal in Greece, New York. They are from the middle Silurian Rochester shale. These were collected last winter, and I have since been unable to identify them. Both are no greater than 3cm in length. Some interesting fine detail is visible on the first specimen. The American dime is 1.8cm in diameter.
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