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Showing results for tags 'cambrian'.
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Chambersburg Elbrook Fm. Fossil Hunting Sites?
HynerpetonHunter posted a topic in Fossil Hunting Trips
Hello, I wanted to ask about the old elusive trilobite, Olenellus. I heard on a topic on here about Elbrook Formation Olenellus near Chambersburg. I was wondering if anybody knows where a good roadcut or something would be? I know how difficult it is to find suitable PA Cambrian sites. I have been to Locust Lane and found some worm traces or rust deposits but no Olenellus. I have left Locust Lane in the dust, and so I want another roadcut of some possible worth. If anyone has any pointers whatsoever then help would be appreciated. Even if a site not in Chambersburg is mentioned, such as somewhere else in PA or maybe West Virginia, I will take that advice. Please help if you can! -
Supermountains might have affected the evolution of life on Earth
Oxytropidoceras posted a topic in Fossil News
Supermountains controlled the evolution of life on Earth Australian National University, February 2, 2022 EurekaAlert posting Scientists discover lost range of 'supermountains' three times longer than the Himalayas By Brandon Specktor, Live Science, February 4, 2022 The destruction of these ancient mountains may have fueled Earth's biggest evolution booms. Selected papers: Zhu, Z., Campbell, I.H., Allen, C.M., Brocks, J.J. and Chen, B., 2022. The temporal distribution of Earth's supermountains and their potential link to the rise of atmospheric oxygen and biological evolution. Earth and Planetary Science Letters, 580, p.117391. Squire, R.J., Campbell, I.H., Allen, C.M. and Wilson, C.J., 2006. Did the Transgondwanan Supermountain trigger the explosive radiation of animals on Earth?. Earth and Planetary Science Letters, 250(1-2), pp.116-133. Yorus, Paul H.- 2 replies
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Cambrian Thrombolite or Stromatolite, Warrior Formation
SteveE posted a topic in General Fossil Discussion
Warrior Formation, Central PA USA It's going to be fun trying to decide if this is stromatolite or thrombolite. As I understand this rock, it records rising seas and deposition of loads of sediment covering up the mound beds. This rock was already coming apart.. The thick layers of sediment were easy to pry off the mounds with my fingers and some gentle help from a butter knife. The whole thing is pretty fragile.
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Another Foss-ilarm ..... oolites in Cambrian Gatesburg Formation
SteveE posted a topic in General Fossil Discussion
I visited an area with little exposed rocks after a major wind event. The root balls of the toppled trees graciously exposed some of the Gatesburg including this sample. I naturally got super excited, believing I had found an egg nest of some oceanic creature, but a friend told me what they really are. Another "Foss ilarm".
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From the album: My Collection
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7th International Conference on Trilobites & Their Relatives
connorp posted a topic in General Fossil Discussion
Registration has opened from the 7th International Conference on Trilobites & Their Relatives in Cincinnati, Ohio. This is a four day conference (including a mid-conference field trip), plus pre- and post-conference field trips. The pre-conference field trip is to the Upper Cambrian of Wisconsin, and the post-conference field trip is to the Ordovician-Devonian of New York. The latter looks like it will visit some very enticing spots (unfortunately it is quite expensive!). The mid-conference field trip will visit several classic Cincinnatian sites, including possibly the famous Mt. Orab Trilobite Farm. I registered for the conference and hopefully can spend a few extra days collecting the Cincinnatian. Hopefully I'll see some of you there! https://www.cincymuseum.org/7th-international-conference-on-trilobites-and-their-relatives/-
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My question is this: Is it too late to enter for the FOTM? Just in case, I'll go ahead and write up my entry: Here are my October Fossil of the Month entries. These were found between Oct 5-8 1st: A complete (well, 98%) Olenellus clarki with both positive and negative. In 8 days of digging and splitting this is the only complete trilobite to split out cleanly and there may be only 3 others (partially buried) 2nd: A larger slab with 31 cephalons (compete and partials) and 1 possible complete trilobite (partially buried). This is by far the largest collection of cephalons on one slab. Most of the time on this much rock there would be 0-3 cephalons. It took me many hours (over 2 days) to extract it. Also took me a week or so to repair all the breaks. This is what it looked like when it arrived home This is after repairs And this is the 1 possible compete Olenellus Clarki on the slab I hope you enjoy my entries and please vote for me Ok, I know they are a little late but come on, it was for a good cause I had to wait. I held off because I didn't want my Secret Santa recipient to guess to quickly where his gift came from So, I mean really, what's wrong with my entries being a little late It's only a couple days...... or months Hope you have a fun day (and if you haven't noticed, I tend not to take myself too seriously ) And I think this year I'm not going fossil hunting just before the Secret Santa party.
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Made it down to the Conasauga Shale as the last of 10 sites on a 4-state, 6-time-period collecting expedition in mid-august. I'll post reports on the other sites (as well as other trips earlier in the summer) later. I elected not to split shale on-site and just collected shale for splitting in a controlled environment. I'm only interested in trilobites that still have the exoskeleton (rather than just impressions). I gently tap the shale until I see a fine crack in a bedding plane and then carefully pry it apart with an Xacto knife. The exoskeletons usually have a hollow space above and below them and are terribly fragile. One must hope that all the exoskeleton ends up on one side of the split. Any still unexposed require tedious removal of matrix under a scope with a fine needle while trying to avoid poking through the exoskeleton into the hollow space underneath. I wick consolidant under the exoskeleton to prevent it from flaking off. Even blowing on it can knock it off. Here are the keepers.
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From the album: My Collection
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From the album: My Collection
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From the album: My Collection
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Kinda a late introduction, as I’ve been a member here in October, but I’ve just remembered that I’ve never introduced myself. I’m a 14 year old dude, and I’m mainly interested in Cambrian fauna and Ordovician soft bodied fauna, my favorites being Vetulicolians, Lobopods, and Marrellomorphs. I also collect theses fossils when the opportunity arises, along with fossilized teeth. I’ve only relatively recently rekindled my interest in fossils, when I stumbled across a PBS Eons video during early 2021. Before this, I’d always loved fossils but physics was my main interest. I didn’t even learn of the Burgess Shale until March or so, but ever since I did, I’ve been absolutely fascinated by the bizarre forms that animals took on during the Cambrian and Ordovician periods. I’ve joined the forum to talk to other people about fossils, and to learn more about them. Here’s my favorite two fossils from collection: Here’s Sigil, my massive rooted Spinosaur(us?) tooth from Morocco. It’s about 5.55” long. I saved up for way too long to get the money to buy this, but was totally worth it. It’s my favorite fossil in my collection. And here’s my fossil plate from the Burgess Shale. It contains 2 marrellas (there’s one on the back) and two other fossils I can’t identify. By a stroke of absolute luck, I managed to get this for free from an auction house.
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OK, on my few trips to the Latham Shale in the Marble Mountains of Southern California I have found a few things that I'm just not sure of. I will include any info before each photo. Scale: little marks are 2mm, bigger numbered marks are cm 1: Ok, first I will include 2 photos of what I question as maybe trilobite hypostome. I haven't found any good illustrations of Olenellus hypostome. I've found probably 10 of these. They all look the same shape though many different sizes. 2: Next, I find a few of these each day. The cephalons from the trilobite species of this age tend to stay in one piece but this reminds me of the anterior lobe of a glabella. I have no other idea. It is round and inflated (about 4mm high) and will pop off the matrix. 3: This one I can't nail down at all. Is it a worm or what???? 4: This is a ? Looks kind of tooth-ish but I have no idea. I might try to get better photos when I find it again (still packed from my flights and driving) That is it. I've found at least a few of each of these except number 3. Thank you for your time and help.
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Hello everybody, This is my first post and first piece of artwork I would like to share and, hopefully, receive some feedback. I do 3D animation and rendering for living, but paleontology is my life long interest and passion. Here is my 3D reconstruction of Cambrian trilobite Olenoides serratus that was a common member of the famous Burgess Shale biota. I actually live just 250 km apart from the famous Burgess Shale quarry (and 100 km from Albertan Red Deer badlands rich with dinosaur fosslis).
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Found on my last trip to the Marble Mountains Latham Shale. I found this when just a little bit was sticking out of the hillside surface. Took me most of a day to extract. As you can see, it didn't as they say "come quietly" I used a couple little tubes of super glue to hold it together as much as possible before extracting it but it still came out in more then a few pieces I spent about a week getting it back together as much as possible (I mean really, who doesn't have some bolts and screws left over when putting their car back together ) I have a lot more advanced prep to look forward to (scribe and abrasion). That will be much further down the road as I'm just getting that set up going and will be a long time before I'm going to be comfortable enough to tackle something like this. Mostly what is found are a few scattered cephalons and a rare complete trilobite once in a while. This slab happens to contain 31 cephalons (from partials, partially buried and complete) and 1 partially buried complete. Plus 1 I have no idea? When I get better photos of that I'll post for ID help. So, the photos follow the order from in-situ find to finished. I finished it as 2 large parts instead of 1 bigger piece. A little extra item in the upper right corner.... my Secret Santa gift waiting for me to open on Christmas Eve Here is the 1 partially buried complete. I think it's an upside down Olenellus clarki This was the most repair by far I've ever had to do. Now, in the distant future I'll start the harder prep to finish it off
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How many Myllokunmingia specimens are known to science? I keep on seeing wildly varying numbers, ranging from 1 to close to 100, and I really want to get a straight answer.
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Sorry if this is the wrong topic category, I don’t have much experience with this forum. I recently found out that there are Cambrian fossils in the Marble Mountains in California, and I’m wondering what the laws are for collecting there. I’ve always wanted to collect Cambrian fossils and that’s the closest location to me, but I don’t want to break any laws. If it is legal, what tools and equipment should I bring? Thanks!
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Flecks of silver in poop of ancient Cambrian creature baffle scientists.
LabRatKing posted a topic in Fossil News
https://www.livescience.com/silver-specks-in-worm-dung Evidence for microbially mediated silver enrichment in a middle Cambrian Burgess Shale-type deposit, Mackenzie Mountains, northwestern Canada As a worms, bugs, and slime researcher, I found this to be exciting. -
Here are some fossils that I am pretty sure is from the ophir shale in utah. I've seen a lot of what looks like inarticulate brachiopods and little worm-like things. Does anyone have any more information? I was wondering what kind of fossils have been found in these rocks? Also, have any trilobites been found here?
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Vannier et al. 2006 assume that Tuzoia and the also Cambrian genus Isoxys are possibly representatives of the class Thylacocephala. Emmended diagnosis for the genus Isoxys by Garcia-Bellido 2009, p. 1224: ”Arthropod with one pair of cephalic appendages and a uniform series of at least 13 pairs of biramous appendages. Long, narrow body covered almostentirely by a bivalved, very thin unmineralized carapace. Prominent, stalked, spherical to pear-shaped lateral eyes protrude beyond the anterior margin of the carapace. Each valve armed with prominent cardinal spines. Dorsal outline straight or slightly projecting to form a weak to well-developed cusp (small circular node may be present below this cusp) anterior of mid-length. Ventral outline semicircular, weakly preplete (valve is highest anterior to its mid-length) to postplete (highest posterior to its mid-length). Simple perimarginal features (very narrow to more inflated rim). No flattened ⁄ concave marginal features. Narrow to broad doublure may be present. Carapace folded along the dorsal line (valves conjoined by a narrow band of cuticle; absence of articulating hinge). Internally, midgut glands may be present. External ornament may be expressed as uniform micro-reticulation or longitudinal striae. (Modified from Vannier and Chen 2000, p. 311)." Hou et al. 2007, p. 118: “This is one of three Isoxys species recorded from the Chengjiang biota. It is relatively rare and, unlike its Chengjiang associates Isoxys auritus and Isoxys curvirostratus, is known only from carapaces. The thin, elongate, bivalved carapace has a straight spine at both the anterodorsal and posterodorsal corners. The posterior spine is longer than the bivalved part of the carapace. Including both spines, carapace length can exceed 100mm. I. paradoxus can easily be distinguished from I. auritus by the unequal and total length of its spines. I. curvirostratus is distinguished from other species of the genus by having a curved anterior spine (Vannier & Chen 2000). Isoxys is a component of the earliest arthropod faunas worldwide. The genus is known from the Lower Cambrian of Spain, Siberia, South Australia and Southwest China and also from the Lower to Middle Cambrian of Laurentian North America. The ecology of Isoxys is discussed under I. auritus. I. paradoxus is unknown outside the Chengjiang biota.” Line drawing from Garcia-Bellido et al., p. 1224: Identified by oilshale using Hou et al, 2007. References: Hou Xian-guang (1987c) Early Cambrian large bivalved arthropods from Chengjiang, eastern Yunnan. Ada Palaeontologica Sinica, 26, 286-298. [In Chinese, with English summary]. Williams, M., Siveter, D.J. and Peel, J. (1996) Isoxys (Arthropoda) from the early Cambrian Sirius Passet Lagerstatte, North Greenland. Journal of Paleontology, 70, 947-954. Chen Jun-yuan & Zhou Gui-qing. (1997) Biology of the Chengjiang fauna. Bulletin of the National Museum of Natural Science, 10,11-106 Hou Xian-guang, Bergstrom, J., Wang Hai-feng, Feng Xiang-hong & Chen Ai-lin. (1999) The Chengjiang Fauna. Exceptionally well-preserved animals from 530 million years ago. 170 pp. Yunnan Science and Technology Press, Kunming, Yunnan Province, China. [In Chinese, with English summary] Vannier, J. and Chen, J.Y. (2000) The Early Cambrian colonization of pelagic niches exemplified by Isoxys (arthropoda). Lethaia 33, 295–311. Vannier, J., Chen, J.-Y., Huang, D.-Y. and Wang, X.-Q. (2006). Thylacocephalan arthropods: Their early Cambrian origin and evolutionary significance. Acta Paleontologica Polonica, 51:201–214. Hou Xian-guang, Aldridge, R., Bergstrom, J., Siveter David J., Siveter Derek J. and Feng Xiang-Hong (2007) The Cambrian Fossils of Chengjiang, China: The Flowering of Early Animal Life, Wiley-Blackwell, ISBN 10: 1405106735. Garcia-Bellido, D.C., Paterson, J.R., Edgecombe, G.D., Jago, J.B., Gehling, J.G. and Lee, M.S.Y. (2009) The bivalved arthropods Isoxys and Tuzoia with soft-part preservation from the Lower Cambrian Emu Bay Shale Lagerstätte (Kangaroo Island, Australia). Palaeontology, 52: 1221-1241. https://doi.org/10.1111/j.1475-4983.2009.00914.x
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Hi, I have this mystery piece of what appears to be anomalocarid appendage of sorts. The problem is I did not receive any information with it and it came out of an old collection from Maine, Usa. I'm not to sure what else it could be from the appearance but I am also very uncertain of the exact species. The piece of a very laminated sparkly shale If I had to guess it could've came from either Burgess Shale, Utah, or Nevada but I not sure what locality it could be from so if anyone if familiar with these shales and can tell from the preservation it would be a huge help, thank you and looking forward to seeing peoples opinions, and if anyone can recommend an expert to show that would also help.
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Someone is selling this fossil at auction, saying they don’t know what it is, but it might be a lobopodian. Any ideas?
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What is this thing? It looks like a platypus worm with spines coming out of its head. It’s from the Maotianshan Shale in Yunnan, China. What is it?
