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Showing results for tags 'Pennsyvania'.
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Found these today. Found in the mahantango formation. I am just looking for identification of these.
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After many fossil hunts at Seven Stars, I finally found a large, prone, almost complete Dipleura dekayi! However, the way the shale split when I chiseled it open, all of the body fossil except the pygidium and a few adjacent segments are on one rock, visible ventrally , but with a thin covering of rock, and the imprint of this covering on the other rock. My original idea was to glue it all back together with field consolidant, then use my dremel tips to prep all the way through the one rock to reveal the trilobite dorsally. However, I am a beginner preparator, and have no assurance (I understand that one can never have assurance that preparation will go well) that everything will work out well, and also the cool textured doublure and the associated hypostome fragment would never be able to be seen again, covered by the rest of the cephalon. Another solution is simply to prep it ventrally, which was not what i was originally what I was going for. Is it possible to prep the cephalon off so that it is removable, so that the underside of it can be visible? Are there any suggestions from seasoned preparators about how I should go about preparing this Dipleura dekayi, which is undoubtedly one of the best specimens in my collection? Thanks for any help in advance; if no clear-cut ideas are given, I may not do anything to it just yet. The main rock, with the impression and the posterior segments: The smaller rock that come off, with the ventrally preserved anterior body with some rock covering it. A 20x magnified view of the doublure and hypostome, showing the striated texture similar to that of unrelated trilobites such as Isotelus, which have been suggested to have been for grading prey on.
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Last year, I drew a Hyneria lindae, based off of recent discoveries and related fish. As soon as I finished it, I started working on a Hynerpeton bassetti, the Ichthyostegoid from the same site that is known from a shoulder girdle and a jaw, and possibly some other material as well. Hynerpeton is known to have been more muscular than Ichthyostega, because of the larger muscle attachments on its cleithrum (shoulder), and at one point was thought to have lost its external gills, but significant doubt has been cast on the evidence for this claim. Hynerpeton's jaw is not as robust as another stegocephalian from the site, Densignathus rowei, which was more derived and muscular. For this reconstruction, the skull (which is covered in skin but fully reconstructed) was based off of Ichthyostega, but the jugal bone was based off of a specimen from Red Hill that has been attributed to Hynerpeton. The shape of this bone affected those around it and suggest slightly different proportions in Hynerpeton than in Ichthyostega, especially concerning the shape of the orbit. The shoulder was incorporated so that the shape of the trunk would be correct, and the foot pads were based off of tetrapod footprints from the Early to Middle Devonian. The lateral line is again based off of its placement of Ichthyostega, as were the scales. In the background, above the water's surface, a forest of Archaeopteris spp. trees and Otzinochsonia beerboweri lycopsids is visible; within the murky river, the red mud that gave Red Hill its name after it was deposited is covered over with plants. This reconstruction is meant to be a sequel to my Hyneria lindae reconstruction I finished about five months ago; unfortunately, I have no specimens of Hynerpeton, which is very rare. If anyone would like to see any citations for the papers that I used in making this reconstructions, please ask below. Enjoy!
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On Wednesday I took a trip back to my Erieopterus spot in Pennsylvania to see if I couldn’t dig myself out a complete. After moving probably around 10 square feet of rock, all I came home with was some Algae’s, pterygotid pieces, and a Erieopterus Head. This is similar to the density of the Devonian Eurypterid faunas of NY. Ether way it’s looking like it’s gonna be a numbers game, and I don’t mind that with Eurypterids.
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From the album: Devonian, Catskill Fm., Pennsylvania USA
Lobe-finned gosh scale- 1 comment
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From the album: Devonian, Catskill Fm., Pennsylvania USA
Lobe- finned fish tooth- 4 comments
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From the album: Devonian, Catskill Fm., Pennsylvania USA
Placoderm armor-
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From the album: Devonian, Catskill Fm., Pennsylvania USA
Early freshwater shark tooth-
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From the album: Devonian, Catskill Fm., Pennsylvania USA
Early freshwater shark tooth-
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From the album: Devonian, Catskill Fm., Pennsylvania USA
Early freshwater shark tooth-
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From the album: Devonian, Catskill Fm., Pennsylvania USA
Placoderm armor-
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From the album: Devonian, Catskill Fm., Pennsylvania USA
Placoderm armor-
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From the album: Devonian, Catskill Fm., Pennsylvania USA
Positive and negative of an unidentified plant-
- devonian plants
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Found this specimen in Pike County, PA. Here are some photos from different angles! This fossil has taken me in all different directions with regards to research. I have been unable to discern what this find may be. If anyone has an idea, I’d love to hear it! (My guess) Lepidodendron or Archaeopteris sapling branch??
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Been finding a lot of these in the mahantango formation, but have been unsure of what they may be. Alongside these (what my untrained eye sees as) Spores, I have found many “V” shaped branches, with the little knowledge I have, my first thought is Cooksonia.. Hoping someone with more knowledge can provide a definitive answer! There are three examples within this one rock and I have many stems in other rock!
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I have been collecting for about three years now in various parts of West Virginia. I was thinking it might be nice to meet some others in the area that are interested in fossils and maybe do a couple trips to different localities. I would be happy to travel anywhere in WV and locations in neighboring states as well. I have included a picture of a nice Archimedes I recently found in Mercer County because we all love fossil pictures!
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This is my first time going to this location. I found some things I’m not sure of and others I think are pretty nice. Would love to hear some feedback. Scale is metric 1. Coral or worn Crinoid? 3. Love these brachiopods 5. So many brachiopods 12. Crinoid 18. Gastropod? 19. Brachiopod 20. Brachiopod 22 brachiopod 24 brachiopod 27 gastropod 32. Crinoid? 36. Gastropod? 37. Bryozoan or worn Crinoid? 49. Bivalve 56. Cute little gastropod.
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I have been meaning to do this for over a year. So this is going to be a bit piecemeal. Me and my son Ian have been collecting in the Catskill formation for 14 years now! In June we made a very quick trip to Red Hill and then to Rt 15. Red Hill as anyone who has recently been there has become a difficult site to find anything new at. Decades of excavation have removed most of the easy material. Our goal has always been to add more fossil evidence to the fragmentary tetrapod remains found so far and in 2021, I thought we had found what I thought could only be a tetrapod shoulder girdle although not well preserved. Unfortunately, when I sent it to the Academy of Natural Sciences in Philly, Ted Daeschler was unable to make any call on it and so it sits in some drawer there. So in 2022 while at Red Hill with Ian on another hot day we decided to take a walk on the railroad tracks. The access is not easy and it's a pretty long hike any way you go. What we found was lag material at the base of the cliff. Probably a flood event that swept a large number of fish (parts) into a very small depression where they were covered. Most of the material is fragmentary Megalichthys mullisoni. There is some placoderm and acanthodian fragments but the next most common fossil is sarcopterygian, probably Hyneria and a mystery sarcopterygian which shows up pretty much throughout the Catskill fm. We went back in June this year and this time brought climbing gear to find and see if we could loosen material from the layer. Turns out the productive layer was just below the lip of the cliff and we were able to drop a bunch of material down to the bottom where amongst a lot of interesting fragments was a posterior jaw fragment. The jaw was fairly low and thick, a large adductor fossa, had no ornament we could make out but a very faint radiating pattern, no cosmine but we could make out a series of fenestra along the Meckelian cartilage. Finally there are four broke teeth (fangs?) of the last (3rd) coranoid and a small empty shelf laterally where presumably the posterior portion of the dentary would sit. All this has led me to believe this is a fragment of Densignathus rowei especially the multiple teeth in the middle of the jaw. I've sent images (multiple times) to Ted and Jason Downs at ANSP but haven't gotten a definite answer. This specimen will eventually be sent down to them but seeing if truly Densignathus, it is not anything new. Still, pretty cool! Lateral view. Clearly no cosmine and no obvious ornament. There is a very weak radiating pattern on the angular. Lingual view Dorsal view. Coronoid " fangs" are the ridge in the middle on the left side. Lateral side is top and you can see the little shelf for the dentary. The adductor fossa takes up most of the right side and the articulation site on the right is broken off. Daeschler, J. Paleont., 74(2), 2000, pp. 301–308 More to come soon!
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From the album: Mahantango Formation
Dipleura dekayi and Eldredgeops rana Schuylkill County, Pennsylvania- 1 comment
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Very common placoderm at Red Hill site, but rarely articulated. Diagnosis. A small groenlandaspidid with a short head shield and tall and narrow dorsal trunk elements. The head shield is almost as wide as long (average W/L equals 0.96). The pineal is divided into two distinct plates in every specimen and the postmarginal makes contact with the postorbital plate, excluding the marginal plate from the lateral margin of the head shield. A continuation of the supraorbital sensory line reaches the caudal margin of the paranuchal plate. The PDL has an average H/L ratio of 2.42. The posterodorsal projection of the PDL is short and angled sharply upward so that the overlap zone for the MD does not reach the caudal margin of the element. The height of the symphysial area on the visceral surface of the PDL is 40% of the total height of the element. The MD is also high and narrow and approximately equal in height to the PDL. The MD has numerous coarse serrations along the caudal margin and tubercles on the lateral surfaces that form rows parallel to the ventral margin. ADL, anterior dorsolateral plate; AL, anterior lateral plate; AMV, anterior median ventral plate; APi, anterior pineal plate; AVL, anterior ventrolateral plate; Ce, central plate; IL, interolateral plate; M, marginal plate; MD, median dorsal plate; Nu, nuchal plate; PDL, posterior dorsolateral plate; Pi, pineal plate; PL, posterior lateral plate; PM, postmarginal plate; PMV, posterior median ventral plate; PNu, paranuchal plate; PPi, posterior pineal plate; PrO, preorbital plate; Psp, parasphenoid; PtO, postorbital plate; PVL, posterior ventrolateral plate; R, rostral plate; Sgn, supragnathal; SP, spinal plate. EDWARD B. DAESCHLER,1* ANNA C. FRUMES2 AND C. FREDERICK MULLISON1 Records of the Australian Museum (2003) Vol. 55: 45–60. ISSN 0067-1975
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Folks from New Jersey and Pennsylvania, Did You Have Any Good Fossil Hunting Trips This Past Summer?
Suchascenicworld posted a topic in Fossil Hunting Trips
Hey everyone, I live in Southern New Jersey and while I usually spend several days fossil hunting, I unfortunately, did not make it out (yet!). I usually go to Big Brook, and hopefully I will make it there in September. In the meantime, how was everyone else's summer in regards to fossil hunting? Any interesting trips or finds? Hopefully your experiences can encourage me to get out there quicker! :-)- 2 replies
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This is a little oddity I found today. It looks like coprolite to me based on shape and detail. I think it's from a fish rather than a creature. Opinions?
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We found these "bark" pieces this past weekend at an Anthracite mine in Carbon County, Pennsylvania. The 3rd picture appears to be a different species and not similar to the diamond shaped things on Lepidodendron.
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