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Showing results for tags 'early jurassic'.
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Just wanted to show you some things I found recently on a plowed-up field in the southwestern German region of Klettgau. My wife and I were there for a hike last week and I heard that it was possible to find fossils in the area. So when I got home I did a bit of research and headed back down there the other day. There is supposed to be an exposure in the middle of a forest, but I didn't have the coordinates, and despite an hour or so of driving up and down the loggers roads, I wasn't able to track it down. However, a few fields which can expose Early Jurassic fossils were also mentioned, so I had a go at them and after criss-crossing them for a couple of hours I managed to come up with a couple of things. As is often the case, I forgot to take my camera along, so I'm afraid I can't show you the landscape, which, by the way, is very nice. Sorry 'bout that. Anyway, here are the two finds after prep. The first is a Chlamys sp. bivalve 2.5cm. in length. Two bits of shell popped off which I had to glue back on. The second and last find took quite a few hours to prep, since it was stuck in a concretion. I wasn't even sure if it would be worth the effort, but it turned out very well in the end. I just had to fill in a bit of the outer whorls with Apoxie Sculpt and carve the inner whorls in order to complete the picture. It's a Lytoceras fibriatum with ø 20cm. The geological map marked the field only as Early Jurassic, but this species can be placed somewhere in the Pliensbachian.
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From the album: Fossildude's Early Jurassic Fish Fossils
Partial ray finned actinopterygian Semionotus sp. Early Jurassic (Hettangian) Newark Supergroup, Hartford Basin, East Berlin Formation. Connecticut. Found on 8/31/2020 The whiteish imprint shows that this fossil has undergone de-phosphatization. This mode of preservation is common in the East Berlin Formation. Link to paper.© 2020 Tim Jones
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Steinkern. Phragmocone.
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I was given another one of these large Arietites ammonites from the Early Jurassic Sinemurian to prepare recently. It turned out that it wasn't worth the effort for my friend, since it became obvious after a few hours of work that there weren't any more ribs to be found after a certain point. You can see this in the photo below. The arrow marks the point where the whorls disappeared and the ellipse shows another area where there were no ribs. So he left it with me and I decided, what the heck, let's do a bit of carving just for fun. I used mostly the attachment on the air pen with the flat stylus until I approached the center and then changed over to the fine point. Took about 7 hours to get it done and now it's found a place out in the garden. I figure I could go into competition with the Moroccans now Arietites solarium. 40cm.
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Early Jurassic Fern - Clathropteris meniscoides
Fossildude19 posted a gallery image in Member Collections
From the album: Fossildude's Early Jurassic Plant Fossils
Plantae; Tracheophyta; Gleicheniales; Dipteridaceae; Clathropteris meniscoides Early Jurassic Shuttle Meadow Formation, Hartford Basin, Newark Supergroup. Found on 2/16/2020, in the company of Jeffrey P. While they are more plentiful in northern part of the Hartford Basin, this is a rather rare find for the southern Hartford Basin In 25 years of collecting I've only found 7 or so examples of this Fern at this locality.© ©2020 T.Jones
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Here's some pictures of Trace fossils from early Jurassic of Western Himalaya. I'm curious if anyone knows what the proper name should be if not "Thalassinoides". Thanks in advance
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Found this rock in Charmouth beach (south west coast of England) a few months ago. The period is early Jurassic and is generally dated to ~190m years ago. I gave it a friend and have got into a debate as to whether it is a fossilised plant or part of a mollusk. Can anyone help resolve this argument/confirm that I am right?! Thanks, J
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This time it was a large Arietites solarium from the Early Jurassic Sinemurian with a diameter of 60cm. which my friend brought to me. Here's what it looked like towards the beginning of the prep. I had just trimmed off the matrix around the edges and moved on into the whorls a bit with a club hammer and pointed chisel beforehand. I had marked the point with a red line where I figured that the ribs would probably not be there any more and asked him if I should carry on nevertheless and do some carving to finish it off. He agreed, so I carried on. The matrix on these pieces can get very hard and this one turned out to be particularly stubborn. It started to get interesting however as time went on, since pieces of rib were turning up where I hadn't expected them. Just goes to show that even with experience you can make false judgements. Since I didn't want to risk damaging the ribs, I started using the abrader as well as the air pen and moved back and forth between the two. Here's how it looked after about 6 hours. It was getting even more interesting, since the ribs just kept on appearing. But the matrix started to get even harder, so I had to turn the pressure on the abrader up to 8 bar (120psi). It was also getting a little strenuous having to lift up the thing each time I had to clean the powder and grit out of the box in order to refill the abrader tank, so I was having to take a few coffee breaks in between. Here's what it looked like after another 6 hours or so. As you can see, I had discovered more ribs farther along the line. The trick is to try to follow the seam between the outer and inner whorls in order to ascertain what's under the matrix without causing any major damage. You can also see the area in between where there is still some matrix. The problem was that the ribs were there, but they had been pressed quite a bit downwards. I worked along a bit more and then sent him the following photo to ask him if I should carve the matrix within the circle or remove it and also to show him with the red line where I thought that the ribs finally disappeared. He decided that I should carve that spot, which turned out to be the right decision in the end. I then ended up discovering a few rib remnants on the way to the centre, but from there on it was mostly carving with the air pens and then smoothing everything out and removing the excess matrix with the abrader. I still had a bit of work ahead of me filling in gaps and making the odd improvement with epoxy putty. Then balancing the color on the repaired spots and finishing off with my trusty rember beeswax finish. By the time I was finished I had invested 28 hours in getting this guy done, but it sure looks to me like it was worth it. My friend too
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Found this rock in Charmouth beach (south west coast of England) a few months ago. The period is early Jurassic and is generally dated to ~ 190m years ago. I have soaked the rock rock in vinegar solution and gently scrubbed it with a soft toothbrush. I can see the small crustacean imprint in the middle, but I am curious RE the pattern on the top portion and grey rock in the middle. There is nothing on the reverse/I haven't been able to expose anything. Please let me know if you see anything interesting or if it’s just a rock! Thanks, J
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I had the good luck to spend last weekend with our Austrian member @andreas along with our friend Thomas from Thuringia. We made forays into the alpine Early Jurassic, or Lias as we call it over here, and the Triassic Tuval stage. We visited two classical sites and had a good amount of success despite limited collecting time due to approaching thunderstorms. I not only found fossils, but also 2 ticks found me. As usual, I forgot to pack my camera. Sorry about that! But at least I can show a few of the finds which I've finished preparing. First of all, some of the Jurassic finds. There's a lot of hematite in this zone which accounts for the colors. This huge thing is called Atractites sp. It's the rostrum of a species of colioid cephalopod. Believe it or not, this is only the half of it. Phylloceras sp. Schlotheimia sp. And here are a few finds out of the Tuval: Arcestes sp. Megaphyllites humilis Sagenites (Trachysagenites) eximius This one is either Trachysagenites cf. herbichi or Spirogmoceras sp. I tend to the latter. Sagenites (Trachysagenites) herbichi with a Megaphyllites sp. in the mouth aperture. A small gastropod. Probably Sisenna sp. Thanks again to Andreas for showing us a wonderful time and also for the ids. The evening at his home together with Thomas and his family was really special as well. I still have a few more things to prep, so I'll be posting some more pics later.
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The theropod informally called "Saltriosaurus" is finally published after so many years as a nomen nudum: The following link is available here: Dal Sasso C, Maganuco S, Cau A. 2018. The oldest ceratosaurian (Dinosauria: Theropoda), from the Lower Jurassic of Italy, sheds light on the evolution of the three-fingered hand of birds. PeerJ 6:e5976 https://doi.org/10.7717/peerj.5976 Although Scipionyx interested me as the first dinosaur found in Italy (it happens to be named after the Roman general Scipio Africanus, who defeated Hannibal at the Battle of Zama in 202 BCE in Tunisia, ending the Second Punic War), I first heard of the dinosaur now called "Saltriosaurus" while reading the book Scholastic Dinosaurs A To Z back in 2003, but what was informally dubbed "Saltriosaurus" is now called Saltriovenator, and after being initially considered a tetanuran, it is apparently an early ceratosaur.
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https://www.livescience.com/63886-jurassic-mammal-relative-38-babies.html
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From the album: FreeRuin's Finds
The imprint of a stalk from an ancestor of the Horsetail. Equisetites sp. Hartford Basin Shuttle Meadow Formation Massachusetts -
Footprint? New Jersey Late Triassic/Early Jurassic Continued
Kurufossils posted a topic in Fossil ID
Hello, this is a part 2 of my last thread with some of my other finds that I've found this at a site in new jersey where some footprints have been found from the Late Triassic/Early Jurassic, I am unsure about if these are footprints of sorts, any help will be appreciated thank you!.thumb.jpg.199bfe7f0722cff28ed302cdfb98578d.jpg)
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Hello, I've found this at a site in new jersey where some footprints have been found from the Late Triassic/Early Jurassic, I am unsure about if this is a footprint of sorts, any help will be appreciated thank you!
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From the album: Fossildude's Early Jurassic Fish Fossils
Semionotus sp. East Berlin Formation, Hartford Basin, Newark Supergroup Connecticut. USA A dephosphatized semionotid from the East Berlin Formation, Hartford Basin. Found October 21, 2017© 2017 Tim Jones
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From the album: Vertebrates (other than fish)
11 mm. long tooth. Missing the point again Recieved on a trade for prep with Sebastian (belemniten). From the slate quarry Kromer in Oehmden near Holzmaden. Early Jurassic, early Toarcian Posidonienschiefer, "Schlacken". -
From the album: Vertebrates (other than fish)
7mm. long tooth. Missing the point Recieved on a trade for prep with Sebastian (belemniten). From the slate quarry Kromer in Oehmden near Holzmaden. Early Jurassic, early Toarcian Posidonienschiefer, "Schlacken".-
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Scanning a small coprolite from Lyme Regis, UK, I noticed this little button-shaped inclusion. I was just wondering if anyone recognized what this might be. My only guess would be an otolith. Any ideas? I'm tempted to try to remove it to get a good look at the other side. Thanks for looking!
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Hello everyone, Today I was going through all my older fossils, and I found this in my box of ammonites. Obviously this isn't one, and I must have put it in that box by mistake. It looks a lot like a coprolite to me, but I have no clue from what animal. Unfortunately I don't remember anymore where I found it. There are two possibilities: either from Lyme Regis (UK), or from one of the Cretaceous beaches on the Isle of Wight. Any clue to what it could be, and maybe what location? Best regards, Max
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Hi all, Maybe this find is past identification due to erosion, but i thought it may be of interest to others Length is around 8 inches I can see similar lines to the shell / tail feature on the right of the 'solid' part.. Wondering if anyone has any idea what it might be? is it two separate fossils perhaps? All the best Ben
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From the album: Fossildude's Early Jurassic Plant Fossils
Small shoot of the Early Jurassic conifer Brachyphyllum scotti. Hettangian. Newark Supergroup, Hartford Basin, Shuttle Meadow Formation Connnecticut.© 2017 Tim Jones
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From the album: Invertebrates
Palaeocoma escheri (Herr, 1865) Early Jurassic Hettangian Blumenrod Coburg Germany Ophiuroid trace fossil -
From the album: Fossildude's Early Jurassic Fish Fossils
Scales and bones of an Early Jurassic coelacanth, Diplurus longicaudatus. Shuttle Meadow Formation, Hartford Basin, Connecticut. Found on 11/14/2016. This is the rarest fish to find in the Hartford Basin. Even small bits of these are few and very far between.© 2016, Tim Jones
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Well preserved with shell.
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