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  1. KompsFossilsNMinerals

    Komp’s Fossil Preps

    Hi all, my good friend @Nautiloidand I have been doing some collecting at a site in the Trenton Group recently and we have been finding what we believe to be Gravicalymene magnotuberculata. The matrix is soft and quite easy to prep, which was a nice surprise. This one was found by my father @Penguin Fiasco Here it was before preparation Bonus headless Triarthrus Beckie appears! All done, now time to clean off the abrasive powder! Here it is after preparation, I am pretty happy with the result. Please excuse the Dolomite on my fingers, I took the plate outside to photograph as soon as I finished prep. Closeup of the Triarthrus beckii body For my first time prepping this material I don’t think I did too bad! There are of course some spots that could use more preps but I really worry about going too far and accidentally burning the shell, so I figure I’ll quit while I’m ahead on this piece.
  2. Hello y’all! On Sunday, my close friend@KompsFossilsNMinerals and I met up once again to do some collecting at La Familia quarry in search of some good trilobites, and as always, we didn’t leave empty handed! We hit a few different sections of the strata, and we managed to have some level of success at every spot we worked.
  3. Nautiloid

    Hypodicranotus striatulus

    From the album: Nautiloid’s Trilobite Collection

    Hypodicranotus striatulus I found on February 19, 2023 while collecting at La Familia Quarry. It’s from the Middle Ordovician Trenton Group, and was found in a stratigraphic section where the species has never been documented. Unlike the vast majority of H. striatulus specimens, this one came from a thin bedded shale unit. Because of this, it is more compressed than most specimens, although the detail is still outstanding.

    © Owen Yonkin 2023

  4. Howdy yall! This past Sunday I met up with @KompsFossilsNMinerals to do some collecting of Ordovician trilobites in the Mohawk Valley of NY. We tried to hit a new site, but it was sketchy and the right strata weren’t all that accessible, so we then moved on to a site that we’ve both spent considerable time at. It was a pretty slow day of collecting, but we both managed to find some sweet bugs before the day was over!
  5. Nautiloid

    Ventral Gravicalymene magnotuberculata

    From the album: Nautiloid’s Trilobite Collection

    This is definitely one of my favorite finds from the fall of 2022. This bug was expertly prepared to reveal even the finest of textures on the shell. Unfortunately the cephalon is slightly removed from the rest of the molt, but I honestly think it looks kinda nice. The majority of these bugs are found as either prone or slightly enrolled. Ventral examples are hard to come by. Middle Ordovician Lower Trenton Group Mohawk River Valley, NY Collected 11/05/2022
  6. KompsFossilsNMinerals

    Isotelus?

    Hi all, I found what I presume to be an Isotelus in the Trenton Group of NY yesterday. I posted the trilobite online and someone was saying that it is not an Isotelus based on how the trilobite looks Micropygous, and that they think it is a Proetid (even though the cephalon looks like an Isotelus’?) The trilobite I found looks to be in the Meraspis stage. Can anyone help clarify if this is an Isotelus, or what it could be if it isn’t? Here are some photos of the trilobite… Photo taken with my digital microscope Pygidium Face Isotelus life cycle I found on trilobites.info
  7. Nautiloid

    New York Isotelus gigas

    From the album: Nautiloid’s Trilobite Collection

    This is a well-inflated specimen of Isotelus gigas from the Trenton Group of New York. Unfortunately the cephalon is missing, but this is still a pretty rare find. Collected 9/7/2022

    © Owen Yonkin 2022

  8. Hey there, me again (since my first ever post had great success)! The photos I am about to show you may depict one or two different animals, found in the Neuville Formation of the Trenton Group (Middle Ordovician). The host rock would be micritic limestone and all pictures were taken in Neuville, 30 km west of Quebec City (Québec Province, Canada). Stratas had a subhorizontal dip, slowly sinking into the Saint Lawrence River. Today, I have 6 pictures showing 6 different specimens. The photos might be showing the same animal, but seen from the top AND the bottom (which are quite different). In my opinion, those are probably encrusting bryozoans. The first three pictures would be the top of the animals, with the individual zooeciums (hundreds of small zooid holes) still preserved; whereas the last three ones would show the bottom. The thing is: I'm not sure and I never asked anyone knowledgeable. My second guess would imply two different animals. The three first pictures would show the top of encrusting bryozoans (or something else?), while the last three ones would be another animal (algae? stromatoliths? sponges?). I'm open to your feelings and diagnosis. Thank you very much!
  9. Nautiloid

    Meadowtownella free cheek

    From the album: Nautiloid’s Trilobite Collection

    Meadowtownella trentonensis Middle Ordovician Trenton Group Glens Falls Formation In the vicinity of Plattsburgh, NY

    © Owen Yonkin 2021

  10. Nautiloid

    Partial Flexicalymene

    From the album: Nautiloid’s Trilobite Collection

    Flexicalymene senaria Middle Ordovician Trenton Group Jefferson County, NY

    © Owen Yonkin 2021

  11. Nautiloid

    Ceraurus pleurexanthemus

    From the album: Nautiloid’s Trilobite Collection

    Ceraurus pleurexanthemus Middle Ordovician Trenton Group Rust Formation Walcott-Rust Beds Walcott-Rust Quarry Herkimer County, NY

    © Owen Yonkin 2021

  12. Nautiloid

    Thaleops americanus molted cephalon

    From the album: Nautiloid’s Trilobite Collection

    Thaleops americanus Middle Ordovician Trenton Group Jefferson County, NY

    © Owen Yonkin 2021

  13. Yesterday my dad and I went to a local trout stream for a couple hours just to get out of the house. We did very well with the trout, I got 4 brookies and a brown and he got 7 brookies. On the way back to the car I noticed a small exposure along the side of the creek and took a few minutes to check it out. I immediately saw evidence of trilobites so I dug around some more and I found some nice stuff, including 3 new species for me. The rock is Middle Ordovician Trenton Group and It seems like the Sugar River Limestone. I will be putting photos on here throughout the day when I get time to photograph my finds Enjoy!!
  14. Nautiloid

    Thaleops cephalon

    From the album: Middle Ordovician Trenton Group in New York

    Nanillaenus americanus cephalon Middle Ordovician Trenton Group North-Central New York Collected 11/07/2020
  15. Nautiloid

    Nice trilobite association plate

    From the album: Middle Ordovician Trenton Group in New York

    2 cephalons: Flexicalymene senaria Unidentified Cheirurid Middle Ordovician Trenton Group Jefferson County, NY Collected 11/09/2020

    © Owen Yonkin 2021

  16. Hello everyone! So a while ago I collected a couple of rocks while fishing up near Plattsburgh, NY. These rocks were from the Ordovician Trenton Group and contained a variety of organisms including inarticulate brachiopods and corals. More importantly though, were the variety of trilobites. In one of the rocks I found pieces of Isotelus, Cryptolithus, and Ceraurus. I was looking at a small piece of that rock yesterday when I noticed a strange little fossil. It was a tiny, spiny free cheek of a trilobite! It looks very similar to Meadowtownella trentonensis although it could be a different species. I do apologize if the pics aren’t great but the fossil is so small that I had to use my microscope to see any detail lol. Also, how do I get my images to be not turned sideways? Thanks for looking! Owen
  17. Nautiloid

    Ceraurus cephalon

    From the album: Middle Ordovician Trenton Group in New York

    Ceraurus pleurexanthemus cephalon Middle Ordovician Trenton Group North-Central New York Collected 11/07/2020
  18. Nautiloid

    Ceraurus hypostome

    From the album: Middle Ordovician Trenton Group in New York

    Ceraurus pleurexanthemus hypostome Middle Ordovician Trenton Group North-Central New York Collected 11/07/2020
  19. Nautiloid

    Mystery hypostome in need of ID

    Hello everyone! So I was cleaning off a rock today and on it I found this tiny hypostome. I was wondering if anybody has an idea of what species this may have come from. This rock came from a site in North-Central NY that exposes the Ordovician Trenton Group. Thanks for looking!
  20. Greetings everybody! While I was on my fishing trip last weekend I took some time to look for fossils. I collected at a couple of creeks exposing the Middle Ordovician Trenton Group in North-Central NY. I found lots of trilo-bits and other goodies! Enjoy
  21. From the album: Ordovician

    Isoteles gigas Partial pygidium and thorax of Asaphidae Trilobite (5 inches long) Middle Ordovician Denley Formation Poland Member Trenton Group Little Falls, N.Y.
  22. From the album: Ordovician

    Flexicalymene senaria Calymendid trilobites Middle Ordovician Denley Formation Poland Member Trenton Group Little Falls, N.Y. prepared by Ptychodus04. Thanks Kris ID help- piranha. Thanks Scott
  23. It was an all day outing on a perfect spring day in Central Upstate New York. Al Tahan and I visited a small private quarry where the Middle Devonian Oatkacreek Formation Mottville Member, part of the Marcellus Shale and the lower Hamilton Group is exposed. It's been about a year since I visited the site which I've been coming to for the past five years and it was Al's first visit. Erosion had broken down almost all of the pieces of shale which covered much of the site on previous visits. However a lot of fossils here, preserved in calcite are weathered free from the matrix and surface collecting can be very productive. This is by far the best site I've been to for the gastropod, Bembexia sulcomarginata. There were dozens strewn about the site. I couldn't resist picking up a few adding to my already extensive Bembexia collection. Brachiopods were also plentiful, especially the large spiriferid, Spinocyrtia granulosa (upper right). I couldn't help adding this inflated example to my large collection. Upper left is Mucrospirifer murcronatus, certainly one of the most abundant and distinctive Middle Devonian brachiopods in New York. Lower left is Protoleptostrophia perplana, a Strophomenid.
  24. Hey everyone, Haven’t posted much about my recent activities so this is a summary of a few things I’ve been up to the past month or so. I had a lot of goals in 2020 with regards to exploring more of the Ordovician rocks in New York. I am very interested in the Ordovician due to the formations and groups represented. The Trenton group, Lorraine group (has whetstone gulf fm and Pulaski fm) have been of great interest to me because I live in Central New York and these rocks are actually very close to me. Last year I did some exploring and it worked out pretty well. I found a great fishing stream with the Pulaski and whetstone exposed. I also found some exposures of Utica shale that I know are promising. I was also able to get permission from a land owner In November to visit a location with the Trenton exposed but I wasn’t able to actually go there till this year. I am going to share my experience with 2 different rock groups I visited recently on several different field days in April and May. The Trenton group and the Lorraine group. Lorraine group, Whetstone gulf exposures northwestern New York Beechers beds. Lorraine group, Frankfort shale Trenton group exposure. Recent permission. The Whetstone gulf formation is probably familiar to many people who are obsessed with New York trilobites, especially the pyritized trilobites. Other than pyritized Triarthrus some may not know about the other fauna found in the Whetstone. Also...nobody is really looking either. Reasons being difficulties getting to the exposures, proximity to state parks and state forests, nobody lives near there so travel is required, private property issues, and LOTS of walking is required. North of Rome, New York around the northern and eastern edges of the tug hill plateau are several enormous gorges with breathtaking exposures. Depending on how ambitious you want to be there seems to be plenty of exposure to see. The whetstone has been regarded as an impossibility complex system with 100s, even 1000s of faunal zones (perhaps a hyperbole or the musings of a frustrated paleontologist!). The fossils that have been found in the whetstone aren’t Fully documented and more work is needed. There are Eurypterids (parts only, super rare) and rare trilobites that have been recorded to be found that are not easy to find information about today. It’s like chasing a ghost trying to even find photos of these fossils. Rudolf Ruedemann wrote a magnificent publication on the Utica and Lorraine formations of New York (1925). Since then his work remains, to me, the best source regarding these formations. Here is a few plates from that. Interesting stuff. Some of the names have changed... Last year I found a calymenid pygidium in some Pulaski formation “drift”. I didn’t hike far enough to reach the whetstone that day so “seeing” the whetstone and exploring is a 2020 goal. Some of the possibilities.....I didn’t find these. These are just examples of a few nice arthropods from the Whetstone. A complete Homotelus stegops from the Whetstone gulf formation. I guess these are very rare A legitimate specimen of some Eurypterid body segments. Whetstone material. Exceedingly rare. Continued.....
  25. Nautiloid

    Unknown critter from Ellisburg, NY

    I found this while fossil hunting in a creek near Lake Ontario in NY. It is Ordovician in age and I believe it is from the Trenton group.
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