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  1. Thomas1982

    20220222_114026

    From the album: Mahantango Formation

    enrolled Dipleura dekayi
  2. Thomas1982

    20220222_113933

    From the album: Mahantango Formation

    enrolled Dipleura dekayi
  3. Took another trip to the Mahantango (Devonian) over the weekend. Went with @Dean Ruocco While my haul was not too terrific, I did manage to grab some stuff to use as trade pieces / donor pieces. Dean did manage to get some nice trilobites but I will let him post those Brachiopod plate: Normally I would leave this as they are a dime a dozen at my locality but figured I would grab this to give to a friend who is trying to get some material to use in a display cabinet at the college he teaches at. Trilobites: Again not the best stuff but always fun to get more bugs. All these I believe to be Eldregeops rana
  4. A.C.

    Eldregeops rana

    From the album: A.C.'s Devonian Pennsylvania

    Mahantango Formation, Pennsylvania.
  5. Hey all, Decided to hit the Mahantango today. This spot has historically produced a complete trilobite during my hunting. While my collecting has become more selective as I have to try to keep storage in mind, I did pick up a few examples that I wanted to share. This I believe is a Platyceras? While I am getting more selective on keeping heads, I particularly liked this association of a head and pygidium. I do not believe these are the same specimen as the size and angles would be off but it did make me think of the rough sediments and potential storms that entombed these two together. Here I have some enrolled Eldregeops specimens, the leftmost is missing its head but flipped over does have the connected thorax. The centermost specimen is bisected and is only what you see in the picture, the other side is simply matching the matrix. Probably due to weathering out of the rock or splitting poorly, (I found him loose among the weathered material.) Additionally the rightmost specimens are complete (or relatively complete) and each show some great detailing of the compound eyes. The three rightmost specimens were found on my previous trip. Lastly, literally my final split of the day I uncovered this little creature! While only one of his spines was showing, I carefully hit the rock and was able to remove some more of the matrix around it. Additionally I managed to grab some more general trilobite material that will be used to give to other collectors in trades or will be donated to a home where they can help shed some light on the fascinating lives of these ancient creatures.
  6. A.C.

    Syringothyris (Rear)

    From the album: A.C.'s Devonian Pennsylvania

    Mahantango, PA
  7. A.C.

    Syringothyris (Front)

    From the album: A.C.'s Devonian Pennsylvania

    Mahantango, PA
  8. HynerpetonHunter

    Asteropygine fossil

    On December 4 my mom and I traveled to the well-known Seven Stars Quarry of Seven Stars, PA a second time (#1 in a post soon!), and our goal was to find more trilobites and cephalopods. This locality is Middle Devonian Mahantango Formation shale, full of a bounty of species. We had found many Dipleura and Greenops on our previous trip, as well as the cephalopods Michelinoceras and Bactrites. Many trilobites that I found were pyritized, the golden Greenops and red Dipleura. But surprisingly, Eldredgeops is absent from the site! Nearly every Mahantango locality includes Eldredgeops rana in the fauna! It seems that the larger and more powerful Dipleura outcompeted Eldredgeops in the large predatory trilobite niche. I wanted to learn more of why Dipleura is everywhere, so I picked through a 7-foot vertical shale hill on the hunt for more clues. I grabbed a large sheet of rock with well preserved Chonetes brachiopods on it and moved it into a bucket. Then I looked back at the spot where it was and sitting there was a small, nearly complete trilobite (above). I thought it was a Greenops at first. I wrapped it in some napkins from the Rutter's nearby, because two chunks were breaking off and it needed protection from further damage. When I got home, I got out my New York Devonian fossil guide (because it's helpful for many Hamilton Group fossil IDs such as Mahantango fossils) and searched for Greenops in the trilobite section. I observed the diagrams and descriptions, and after I checked my fossil for features, I determined that I had not a Greenops but a Bellacartwrightia. This is a rare species outside New York (mainly at Penn Dixie FP), which explains why I had only found one in my multiple trips to similar sites with fossils like Penn Dixie's. I was naturally excited. But as time progressed from Dec. 4 to today, I began to get suspicious of my highly thoughtless conclusion. I had no backup species to think about, if I had made a wrong ID. Today I was reading a paper on a group of phacopids and realized that a diagram of a pygidium on the paper was almost identical to my trilobite. I came to a much more acceptable conclusion: I had a species of Asteropygine trilobite. Annoyingly, I had no knowledge of what genus/species it is AND I had accidentally posted this cool bug as an entry for IPFOTM. I need to redo it. But, overall, a rare trilobite in Asteropyginae is awesome. What a trip!
  9. Hello all, yesterday I led a trip to the Montour Fossil Pit with several other Swarthmore students as one last fun thing to do before final season begins and everyone gets consumed by work. We had 5 people in total including myself there and we had quite a good time. Currently I am in the process of receiving images of everyone’s finds and several students want their stuff ID’d so I have a post for that under the proper section to get their questions answered but I thought everyone would enjoy a more general trip-report style post, I will update this post with other people’s finds as they come in. Here are my finds: A coral stem A partial bivalve with both sides preserved. Mediospirifer brachiopod What appears to be a spirifer brachiopod with all the folds well preserved. 2 Chonetes brachiopods, one with a crinoid stem fossil as a bonus. And finally my favorite find of the day, a very very small Greenops pygidium, which was preserved in great detail. Hope you all enjoy these! Caleb
  10. cabes234

    Montour Fossil Pit ID’s

    Hello, as I mentioned in a recent post, today I led a group with several students from my college to the Montour Fossil Pit and Preserve. All of the members found fossils and several of them want to have their fossils ID’d. These images come from one such member who wants to have her fossils ID’d. I think I know what some of them are and there are others I have no ideas about. Here are my guesses: 1.) Some sort of Bivalve probably Cypricardella? 2.) Very Large Strophodonta 3.) Some sort of brachiopods, I dont know about the bottom left, I can also ask her for a higher quality photo of it if that would be helpful 4.)Crinoid Stem 5.) Center: Horn Coral?, Top and Bottom: Brachiopods 6. Some kind of Gastropod, Can’t identify genus. It is totally possible that I am wrong about many of these, (except the crinoid stem, I’m pretty sure of that one), but any help with these would be appreciated.
  11. I_gotta_rock

    Beltzville State Park, PA

    Beltzville State Park is one of those rare parks where collecting is allowed. The adjacent federal land, owned and operated by the Corps of Engineers to operate the dam there, is accessible ONLY WITH A PERMIT. It is a functioning spillway and there is a gun range for the local police, so you and USACE need to make sure you are safe. With that important disclaimer out of the way, here's the good stuff! Beltzville is a very productive Middle Devonian site which includes the PA State Fossil, the trilobite Eldredgeops rana. Although no one in the group found any definite complete buggies, a lot of froglike trilo faces went home in our buckets! It wasn't all trilos, though. We found bryozoa, corals, pteria oysters, gastropods, crinoids and probably a dozen kinds of brachiopods. I led this trip for the Natural History Society of Maryland. The trip director made this lovely video of our day: https://www.youtube.com/watch?v=wdB5atWQmeQ Yes, I realized about 20 minutes after she took that video of me showing off the pop-outs that I was holding the fronts of the cephalons of one species, not the eyeballs of the other. This is what I get for not looking with my reading glasses first! Most of my finds I gave to whoever was sitting closest to me, but here are a few I kept.
  12. Thomas1982

    Mahantango Mystery

    Hello all, My daughter and I were cracking open some Mahantango Formation rocks left over from our fossiling trips last summer, and found this... ? Any ideas what it might be? Found Schuylkill County, Central Pennsylvania Thanks! Tom
  13. Hello everyone! Last summer when going on a trip to PA I stopped by a site where some Mahantango formation material was found, The finds weren't anything too spectacular or plentiful but it was still a nice place to stop by. While there I picked up quite a few concretions just to see if anything is in them, and for a few months they stayed outside to weather and break down a bit. Most of them were completely devoid of anything but one did reveal this interesting little fossil. The whole thing is about 2 cm long and 2mm in width, it has some neat branching to it. I initially thought it was a bryozoan and didn't really think much of it otherwise but after getting to cut it from the large concretion and examine it closer it appears to be carbonized? The whole thing is much darker than the surrounding matrix except for a few parts covered in pyrite, and looking under magnifiation it appears that the fossil has some striations going along its length, it might still be a bryozoan but these thing made me question that ID. Does anyone know what this might really be?
  14. Inspired by a post last week by @I_gotta_rock, I decided to take a bit of an impromptu trek out to Centralia to add some of the famous white fern plates of the Lewellyn formation to my collection. I say impromptu because I was told I needed some pretty good rock climbing gear to be safe at the site, I ordered some pretty nice rock climbing gear too, still decided to go take a peek before everything arrived leading to one heck of an adventure that still has me smiling from ear to ear. We got our stuff ready to head out bright and early when I immediately hit my first snag, last week's adventure to the C&D canal left me with an absolutely lovely set of scars above my ankles from the thickets of exactly-the-height-of-my-ankles thorn burrs that had overgrown the spoil piles. Given that the scars were still healing, I decided to forego my normal high cuff desert boots that would surely rub against them all day for my trusty pair of low cut boat shoes. I'm pretty good on my feet right it'll be just fine yep. Off we went, excited to check out the mystery 'burning town' and the fossils said to be found there, a decent bit into our drive down 61 I noticed a billboard for 'Deer Lake Pub & Restaurant'. I thought to myself "wait didn't some guy find trilobites behind some bar in Deer Lake?" oh he sure did, queue "Hey hun, wanna have dinner at that nice little pub on the way back? maybe check out the rocks around the random excavator they have in the parking lot?". I got the go-ahead and gave a silent fist pump, two birds with one stone! We had barely any trouble finding the site out in Centralia, thanks to excellent directions from @I_gotta_rock and an encounter with a man and woman on the path out as we were headed in. He held a gigantic slab of black shale as triumphantly as any athlete with a trophy and she followed behind hefting a yellow 5-gallon bucket. Few words were exchanged but I do hope they browse this forum. Not too shortly after we arrived at the slope of scree and made our way to the top to survey the site. The view was breathtaking, overlying the subtle thought of "hold up it didn't look this steep in her photos" - though an adventure we came for an adventure we were going to have. We spent the afternoon slipping and sliding across the scree, maintaining a low center of gravity (butt-scooting) as we clambered up and down the slope. To say the site was plentiful would be an understatement, we were literally walking over layers of fossils. I decided to focus primarily on collecting small/medium sized specimens as the shale was quite fragile and dragging a 15lb chunk of rock up that slope would've brought me too close to my own mortality for comfort. We wrapped up our time in Centralia after collecting our fill and emptying my shoes of scree for the 10th time, leaving enough time for a short drive down 61 to Deer Lake. As the sun was setting we pulled into the parking lot at Deer Lake Pub & Restaurant, parking a stone's throw away from a freshly made cut into the Mahantango beneath a nicely perched excavator. We took a short look around the site, primarily shale/scree with plenty of good looking rocks to hit with a pick. Hoping for a trilobite we lost the race against the sun going down but did make out with a small bounty of brachiopods and a crinoid stem. All told, I couldn't be happier with the day's haul having just finished basic prep work at 10PM. I'd say the finds of the day were a mystery specimen from Centralia that i'm hoping is some sort of seed, a clean/closed clam like brachipod from Deer Lake and numerous well defined small to medium sized fern plates. Site view - Centralia Site view - Deer Lake
  15. A.C.

    Unknown something

    Really not sure what I have here, it definitely stands out from the surrounding matrix. I found this chunk at the Rockville Quarry site north of Harrisburg PA. There are some brachiopods in the surrounding matrix.
  16. Hello everyone, These were all found in St. Claire, PA. Mahantango Formation. Anybody know what these are? #1. Looks like octopus suckers in brown outline. Is it a coral? #2. Crinoid star stems? #3. Cylindrical molds, what are these?
  17. FossilizedJello

    Mahantango formation clam or armored fish?

    Could it be Zascinaspis heensi or just a clam?
  18. cameronsfossilcollection

    Gastropod or something similar?

    Hey again, this is a very tiny ~.5cm shell that I found some time ago at the regular road cut at the Lost River exposure of the Mahantango Formation. I would guess it’s a Gastropod or something similar but if it could be narrowed down any further I would be elated. Thanks guys!
  19. cameronsfossilcollection

    Devonian Marine Plant/ Bryozoan?

    Found at the Lost River roadcut site, never found anything like it since. My initial assumption was that I’d found a marine plant, but the world of fossils is a broad and mysterious place, so I wanted to know what you guys think. Let me know if you need anymore info, and thanks!
  20. cameronsfossilcollection

    Mystery Fossil from the Lost River - no idea!

    Here with another fossil, and I’m pretty sure this time it’s actually a fossil Distinct striations on a smooth impression in the shale. Just half an inch longways and about .4 inches tall. Found at the regular Lost River cut, Middle Devonian age. Thanks guys!
  21. cameronsfossilcollection

    Another Lost River Mystery Fossil

    This one is very strange guys. I was cleaning my fossils off and had noticed this strange shape - I thought it was dirt until it didn’t wash off. I found this in the Middle-Devonian aged Lost River roadcut near Wardensville. It’s got a thick outline that comes off the shale a little bit, but it shows up pretty bizarre on the camera. Let me know if I need to upload different images. Thanks everyone.
  22. Rocky Stoner

    Ridgeback pygidium

    Hi forum friends. Cleaning out the back of my pick-up, I noticed this pygidium. It looks a lot like the eldredgeops I commonly find here but has a distinctly high ridge along the centerline. Could be just a molt that was "pinched" upward by the sides ? or possibly something different Cheers .... and thanks,
  23. I_gotta_rock

    Need Crinoid refrence

    I have some beautiful crinoid stem cross-section impressions from the Devonian Mahantango in PA (runs from NY to VA) and have been searching all morning to find a good reference book that won't cost me $100 just to open the cover and see if it's adequate to the task at hand. Winifred Goldring seems to have done the definitive works, but she didn't include any cross sections! Can anybody point me in the right direction?
  24. New location, still in Eastern Panhandle WV. One picture has the tip of a pencil so you can see size. The circled part...I am not sure. Are the shells brachiopods? I see some crinoid stem in there. Thank you for your insights.
  25. This was my first time at Beltzville State Park in Pennsylvania, USA. I believe these come the Upper Devonian Mahantango Formation. I saw similar examples in other posts as was hoping to confirm my guesses. Thanks 1. Horn coral? 2. Crinoid stem?- not sure if that’s something to the left of the stem. 3. Rugose coral?
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