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Showing results for tags 'Cambrian'.
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From the album: Trilobites
7mm. long. Type specimen was originally named Ptychoparia. Synonym: Deissella Middle Cambrium From Antelope Springs, House Range, Utah Thanks to Tony (ynot) for this one.-
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Lower Cambrian Trilobites in South Central PA?
cameronsfossilcollection posted a topic in Questions & Answers
Hey there everyone. I’m currently up in New York hunting for fossil, and tomorrow I’ll be riding through PA and have been itching to collect at the Kinzers Formation and was wondering if anybody in the forum was familiar with any public access areas to find any Cambrian material? I’ve done a fair amount of reading and it seems like a lot has either been over-collected or is in closed quarries. Any information would be greatly appreciated! -
A friend has a trilobite marked as Eoptychoparia piochensis from the Cambrian of Pioche, Nevada (Pioche Formation). I wasn't familiar with it and looked it up but couldn't find much info at all. Is that genus valid (maybe just rare)? I collected a couple of different spots out there about twenty years ago - didn't find much - and don't remember hearing about E. piochensis. Thanks, Jess
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Cambrian Trace fossils from SE Arizona - Latest expedition!
Arizona Chris posted a topic in Fossil Hunting Trips
Hi all, Once again we are back from a weekend of fossil sleuthing in south eastern Arizona south of Tucson. The Upper middle cambrian Abrigo formation is mostly limestones, but the lowermost member is either a dark grey shale, or green glauconitic micaceous shale. Gorgeous stuff! Three main localities were visited - the 80/90 Roadcut (mostly trilobits and brachs), Ajax Hill near Tombstone (trilobits), and and area near Colossal Cave just south of Tucson. (tons of trace fossils). Trace fossils are very abundant in both the Abrigo Formation and the slightly older Bright Angel Shale in northern Arizona. Nearly all trace fossils found were in a micaceous glauconitic green shale, in isolated beds found throughout the Abrigo, especially in its lowest beds. The most commonly found types were from sediment ingesting worms, with a number of disks and rings from stemmed Echinoderms where they attached to the sediments. Also found were the attachment depressions of solitary and colonial cnidarians. Years of searching did not however reveal any trilobite tracks or traces. This was surprising since there are so many trilobite fossils in the Abrigo. Most fossils are in a single bed or plane and represent variations on Planolites, or Paleophycus. Another surprise was that no Skolithos was found either. This seems to indicate we are in a deeper water environment rather than near shore like the Tapeats or Bolsa sandstones. Collecting of the shales was pretty easy. Most were in big piles at the bottom of small cliffs, and often did not have to be split. Nearly all were on the bottom of the slabs (positive hyporelief) and you had to flip over the slab to see what was on the bottom. Here is a representative selection of fossils we have found at the three sites. Paleophycus Hold fast traces of a stemmed echinoderm, possibly Gogia. Bergauaria - A prize find. dozens of Cnidarian (sea anemome) suction cup marks can be seen clustered in a group on this former hardground. Thanks for looking. we put together a far more extensive write up if your interested on our paleo web site, please visit for more exciting specimens: http://www.schursastrophotography.com/paleo/Abrigo-6.html Chris
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Hi all Were going through the last fossils from our long series of trips to the Cambrian Abrigo formation in south eastern Arizona, and we have a few fossils that I have not seen before. My thoughts are some sort of stem ossicle or foram like animal. What do you think? Have you seen such a thing before? Thanks.
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Aloha! Planning a short trip to California before I move further away, I was always fascinated by fossils. Are there any dig sites in California that rent out tools? I would love to find a trilobite or ammonite! Any tips would be greatly appreciated!! Thanks!
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Well, not oldest but earliest. Parasite attached to brachiopods https://www.livescience.com/cambrian-parasites.html
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Hey this little thing is driving me bonkers, most times I’m close to ball parking what some thing is but this I have no idea. Is it just sediment ? It’s ivory white on the outside with a chocolate brown inner layer and a light brown swirl at the center.
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I’ve decided to take a break from dissertation writing and write up something else instead, one of the greatest fossil hunts I’ve been on, my trip to the Burgess Shale. Its been a little while since I got to go but here is the story as I remember it. I’ll write this up in a few parts since I took a lot of pictures and I’m going through and editing them as I go. Part 1: Going on an Adventure A little bit of background to start off. When I was younger (around 12 I think) I got the opportunity to go to the Smithsonian Museum of Natural History in Washington DC. Of all of the displays my favourite was a small board under glass with a half a dozen or so small dark slabs of shale, the museums display of the fossils of the Burgess Shale. I can’t remember if there actually was a Pikaia on display but I distinctly remember the Pikaia and when it came time to exit through the gift shop I went the book which had the closest looking thing on the cover. That book, needless to say, was Stephan Jay Gould’s ‘Wonderful Life’, a book which was admittedly a little above my reading level at the time but one that I was enthralled with nonetheless. I knew that one day I had to go see where they came from for myself. Fast forward to five years ago now, I had finished high school a few months previously and was one week away from starting university. For my graduation present I had been given tickets for a guided tour, my father and I were going, I was going to get to see the Walcott Quarry in the Burgess Shale. The whole trip was going to take three days, my father’s car (a beaten up red Ford Windstar which we weren’t sure was going to survive the trip) was packed was packed with tents, a small amount of other camping gear, my trusty blue backpack, and the requisite 5lb bag of trail mix and we set off on our way since the driving would take the better part of the first day. The folks at the border were a little suspicious when we told them we were going to Banff for only two days but after a half an hour or so of checking over the car we were allowed on our way again into Canada. After a few hours we started to get into the Rockies. Growing up in western Washington I’m used to big mountains but while the Cascades were large these were different. I took a few pictures out the car window, the sharp treeless peaks of some almost looked a little like teeth. After a long day’s drive we reached our campsite, just a few miles away from the parking lot where the tour would start the next day and set up camp. The next morning we were up with the sun. Our tour group consisted of about 8 of us in total, my father and I and a handful of others, mostly retired petroleum geologists. Just a few minutes up the trail and the scenery was already breath-taking with a waterfall thundering over the nearby rock face. Soon we had properly left civilisation behind and after about an hour or so of hiking, stopped at the edge of a crystal clear glacial melt water lake where the ranger went over a little about geologic time, using the ever popular calendar analogy (that humans have been around only for a few hours on the last day of the year compared to the age of the rocks we were going to see). The hiking became tougher as the incline increased, through the forest. I’d been on a fair number of hikes during my many years with scouts but I was definitely out of practice compared with the rest of the group, mostly septuagenarians, who seemed to make it up the trail like they were part mountain goat. After another little while there was a sign on the side of the trail and even though the surrounding mountains were shaded by the trees I knew we were getting closer. We stopped briefly to go over the regulations of the area, there is of course no civilian collecting in the Burgess Shale. The ranger also explained how rare the soft bodied preservation present was and passed around a map dotted with the locations of all the spots on the globe with Burgess Shale type preservation. I quickly took a picture in case I was ever nearby another one before we started on our way again. Continued in Part 2 . . .
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Hello everyone, So I’ve had an account for a little while now but haven’t done much yet and I never introduced myself so here goes. I’m Benton, amateur fossil enthusiast from around Seattle. My background so far is in archaeology and I’m currently working on my master’s degree in Human Evolution, but my primary passion is fossils and hopefully they will become my PhD. I study in the UK so most of my fossil collection comes from the Yorkshire coast, including my prised dinosaur footprint, but I have an ever-growing collection from everywhere I go and am learning to prepare some. My primary fossil passions are with early life of the Cambrian and Ediacaran (I’ll have to share my Burgess story soon) and pterosaurs, but this is by no means the full extent of my fascination. I also love fossil endocasts (but haven’t found one yet) and am hoping to study the brains of pterosaurs for my PhD. Some of my favourite specimens form my collection so far, The aforementioned dinosaur footprint A knightia mass mortality slab found last summer A hybodont shark spine from Aust which I hope to prep soon A small flower from Clarkia (my photo) which I don’t know the genus for yet Thank you all for having me and for your input into how to keep my rocks from falling apart. Benton
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I found this on a beach in Sutton, North Dublin City, April 15th, 2020. To all intents and purposes it feels like stone and more than likely is. I only post it due to its perculiar shape, what looks like a concentric ring pattern on the concave side, on the opposite side four small striated lines and on the 'top' what looks like a portion of a socket. Thank you in advance for any suggestions, I will be happy no matter what the opinions are. Regards, Waggath
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Wins from an auction hosted by my friend @Kasia These bits are in a medium grey limestone found at Raback, near Kinnekulle, Vastegotland, Sweden, so are probably from the Upper Cambrian part of the Alum Shale Formation. Maybe Peltura scaraboides? Or is there not enough left to get close to an id? Max 5 mm wide and 4 mm long. All specimens are on the same rock. The scale's in mm and is partially obscuring a bit seen better below : Not really expecting too much from these tiny fragments, but any help or blind guesswork very much appreciated. @piranha @Johannes @Dromiopsis But anyone else more than welcome to comment too Thank you.
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I wanted to add a bit of cambrian fossils to my collection. So I did some research on ChengJiang biota protection and the fossil laws of China(As of updated to 2019,I am from Hong Kong so I can read the documents) According to the Chinese Chengjiang biota protection area,the maotianshan area is a protected site,but surrounding areas do not have such protection(Its like other parts of China),where such fossils can still be found in. Yet,according to the Chinese fossil law,fossils listed as special protection cannot be commericalized,and the fossils from ChengJiang fits the description: 第七條 按照在生物進化以及生物分類上的重要程度，將古生物化石劃分為重點保護古生物化石和一般保護古生物化石。 具有重要科學研究價值或者數量稀少的下列古生物化石，應當列為重點保護古生物化石： （一）已經命名的古生物化石種屬的模式標本； （二）保存完整或者較完整的古脊椎動物實體化石； （三）大型的或者集中分佈的高等植物化石、無脊椎動物化石和古脊椎動物的足跡等遺跡化石； （四）國務院自然資源主管部門確定的其他需要重點保護的古生物化石。 重點保護古生物化石名錄由國家古生物化石專家委員會擬定，由國務院自然資源主管部門批准並公佈。 (Number 7 According to the importance on creatures evolution and creatures taxonomy,assign the fossils to be special state protected fossils and normal protected fossils. Specimens with important sciencific importance or scarce fossils of the following types of fossils,should be listed as special protected fossils 1 High quality fossils(complete for example) of described fossils. 2 Complete or mostly complete specimens of veterbrates 3 Large or concentrated fossils of highly evolved plants,invertebrates or trace fossils of veterbrates 4 Other fossils made special protected by the Chinese government. The list will be made by paleontologists and be publish after approved. Yet i couldnt find any information on chengjiang fossils being on the special protection list,since it fits 3 quite well,and since I am in Hong Kong,technically part of China,does it mean that the fossils are legal to own?(By Chinese law)
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Hi There Myself and my two boys have just started fossil hunting. We have no clue what we are doing ,but it's exciting and the boys are ecstatic about doing this and very eager to learn. Please help with our first identification. This rock is used as an artificial river bed filler. We don't know where it was quarried ,but are keen to know what fossils are inside. I'm assuming some type of sea bed coral or tube. PS: Will return rock when identified.
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Seems like it also preserves a little bit of antenae as well.
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Yesterday I traveled to vintage pa in the hopes of finding Cambrian fossils or more specifically Anomalocaris fossils which had been found in a former quarry nearby and in the same formation I was hunting. I went to an outcropping of the kinzers formation that I saw on the Wikipedia Image that I have attached, but after an hour of splitting rocks I didn’t find anything recognizable. I was hoping someone knew if I was doing something wrong or if it was just not a good spot? thanks, Noel
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Help request! I am putting together a tool for judging rock age based on very crude, whole-rock, hand-sample observations of fossil faunas/floras -- the types of observations a child or beginner could successfully make. I view this as a complement to the very fine, species-level identifications commonly employed as index fossils for individual stages, biozones, etc. Attached is what I've got so far, but I can clearly use help with corals, mollusks, plants, vertebrates, ichnofossils, and the post-Paleozoic In the attached file, vibrant orange indicates times in earth history to commonly observe the item of interest; paler orange indicates times in earth history to less commonly observe the item of interest. White indicates very little to no practical probability of observing the item of interest. Please keep in mind that the listed indicators are things like “conspicuous horn corals,” purposefully declining to address rare encounters with groups of low preservation potential, low recognizability, etc. Got additions/amendments, especially for the groups mentioned above? Toss them in the comments below! Thank you..... https://docs.google.com/spreadsheets/d/1tVm_u6v573V4NACrdebb_1OsBEAz60dS1m4pCTckgyA- 5 replies
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Some fossils from Middle Cambrian Balang Formation, Hunan
YXWYX posted a topic in Member Collections
Archotuba sp. (7cm) Anomalocaris frontal appendage (size: 3cm) Tuzoia retifera Walcott, 1912 Isoxy auritus Tuzoia sinensis Pan, 1957 (size: 4cm)
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I believe it’s a feeding appendage. I’ve been told it’s an anomalocaradid feeding appendage, but i don’t remember any of the anoms iv seen having anything quite like that. I can’t remember ever seeing it in context, although feeding appendage definitely seems right.
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Hello, everyone, I’m newly retired after 39 years of teaching. Over the years, I have collected, by purchase, to use as demonstration pieces in the classroom a wide collection ranging from Archean microbial mat cross-sections through time to Holocene cave bear vertebrae. My collection is very diverse through time, if limited in depth. I have a nice collection of Silurian-Devonian trilobites, some nice Devonian-Permian plant material, and a range of Holocene mammal bones; vertebrae and mandibles. ... I taught a variety of upper level secondary courses over the years. As Science Dept. Chair in an independent school, I oversaw curriculum (shorthand for “I got to teach what I loved) For many years I taught an Natural History course to seniors looking at the evolution of the Universe. First term Cosmology-Planetary Science; Second term Evolution of Life. A dream job. Now, I’m trying to complete a more formal indexing of my collection (which includes MANY casts as well). Nice to find you folks. Probably will be an infrequent visitor. Glenn
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Some trilobites I have from Guanshan Biota: Breviredlichia granulosa Undescribed Redlichia sp. Juvenile R. yunnanensis A pair of unpreped B. granulosa.
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Breviredlichia granulosa, ZHANG & LIN in YIN & LEE 1978, from lower Cambrian, Series 2, Stage 4, Wulongqing Formation (Guanshan Biota), Yunnan Province, China.
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Weeks Formation Trilobite - Genevievella granulatus (Walcott, 1916)
YXWYX posted a topic in Member Collections
Two of my weeks formation trilobites, will show more in a few days. Order.: PTYCHOPARIIDA Family.: LLANOASPIDIDAE Gen.: Genevievella, LOCHMAN, 1936 Rare trilobite with a large characteristic spine starting from the 7th axial ring. LINK: http://www.backtothepast.com.mx/ebonino/html/weeks_trilobites_1.html#Genevievella(3).thumb.jpg.e948dd0e4c12d79f950ee6aaf8d5894f.jpg)
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Formerly "Democephalus" granulatus. Moved to new genus by M. Beebe (1990) in his unpublished thesis. Has distinct ridges eyes, long spines in the librigenae. The thorax has a granulose surface; the pygidium is semicircular.
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Reconstruction of Hallucigenia hongmeia sp. nov. Note that the head part and anteriormost two appendages in front of plate pair one are entirely hypothetical.
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