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  1. Dimitar

    Pre-Cambrian colision

    My next question is a difficult one. There was a colision . In the beginning I was suspecting a fall. Then I suspected a meteor. And I was almost convinced about meteor. Then, today I visited the place for the 3-rd time and I found that some layers are folded. So if there was a meteor, the layers should not be folded. Therefore - it was a simple colision between South and North platforms. ( or it was between Canadian platform with oceanic shelf. ) In such small place I see a very solid bottom - bed rocks - made of sandstone / possible Potsdam/. First layers - almost no life.
  2. Tidgy's Dad

    Adam's Cambrian

    A rangeomorph holdfast trace fossil from the Ediacara formation, Rawnsley quartzite of the Flinders Range, South Australia. This specimen is Medusina mawsoni, so called because it was until recently thought to be a jellyfish, but is now believed to be the attachment point of a fractal rangeomorph as Charniodiscus is the point of anchorage for Charnia sp. This one may have been the holdfast point for some species of Rangea. The diameter of the outer circle is 1.5 cm and the fossil is estimated to be 555 million years old.
  3. May be a bit of an odd question, but I was wondering what horizons or layers are the most fossiliferous in the Conasauga Formation. I've heard about the Tibbs Bridge site (RIP), but that site exposed a calcareous, light-colored shale from the upper part of the Conasauga. From what I read online it seems that most of the trilobite beds are located in the upper shale layers of the formation, but I was wondering if anyone else knew if the other parts of the formation had anything?
  4. The diameter of the dark colored depression is about 1.5 cm. Around this depression there are only very faintly indicated ring-shaped structures with a diameter of about 4 cm. On the slab there is another, smaller impression of a second medusa. The Krukowski Quarry near Mosinee has yielded quite a few amazing ichnofossils. The ichnofossils are from either the Mount Simon Sandstone or from the Wonewoc Formation and are preserved in medium to coarse grained sandstone. Hundreds of jellyfish impressions up to 70 cm in diameter were found on several bedding layers. Identified
  5. I would like to use photographs of fossils as part of my digital artwork. I do not want to violate any copyright laws if I later sell the artwork. Does anyone know where I can find free-use images of fossils or does anyone mind sharing their personal fossil photographs with me? I will give credit to you for your photography if I decide to use the images in my work. Fossils of any type and from any time period are appreciated. Thank you!
  6. TNCollector

    Cambrian Stromatolite

    Got the itch to collect and study some stromatolites, so I did some searching and feel that I successfully scratched the itch. I found a section of the Cambrian Copper Ridge dolomite that exposes a plethora of stromatolites of various morphologies. Many of them look as if they are straight out of Shark Bay in Australia, with the characteristic domal structure attached to a thinner holdfast on a hard substrate. Stromatolites are formed over a long period of time in tidal zones by colonies of photosynthetic bacteria and/or algae that form sticky layers that trap sediments and concrete them into
  7. Morning all, my second post here after the presentation, and hope i'm doing everything right! Here the tricky question: I have received this piece from Chengjiang, more likely from the surrounding areas of the site. I'm pretty familiar with this fauna (have a lot of specimen, sometimes prepared by me) but when I saw this I was thrilled. The overall structure is no longer than 3cm along the curve, and I haven't touch it for any sort of preparation. Before I'll post it on my Instagram, I would to know better what it is. The shape and the "button"- like dots, circled in green
  8. Ludwigia

    Elrathia kingii (Meek 1870)

    From the album: Trilobites

    From House Range, Millard County, Utah. Middle Cambrian Wheeler Formation. Thanks to Tony (ynot) for the trade!
  9. From the album: Trilobites

    13x9x2cm. A nice plate from the Wheeler Shale, Middle Cambrian in the Antelope Range, Utah.
  10. 500 million-year-old fossil is the granddaddy of all cephalopods By Laura Geggel, Live Science, March 29, 2021 Cephalopods: Older Than was thought? Press Release No. 24/2021, Heidelberg University, March 23, 2021 The open access paper is: Hildenbrand, A., Austermann, G., Fuchs, D., Bengtson, P. and Stinnesbeck, W., 2021. A potential cephalopod from the early Cambrian of eastern Newfoundland, Canada. Communications Biology, 4(1), pp.1-11. open access Yours, Paul H.
  11. Hello, everyone, these fossils were collected from the basal Cambrian in South China, all of which are organic. But I do not know what are they? Does anyone can identify them. Please see the attachments! Many thanks.
  12. This small fossil is from Chengjiang and was labelled as "Anomalocaris mouth" by seller. He's been wrong before and I'm rather skeptical about that interpretation. Any ideas, anyone?
  13. paleo.nath

    Cambrian mystery fossil?

    I ordered this plate of trilobites a while back and just recently noticed something peculiar on the side of the rock, i’m pretty sure this is not a trilobite but it still looks somewhat organic, but i’ve got nothing. Any ideas!
  14. historianmichael

    Georgia Cambrian Mystery Trilobite

    When splitting some extra matrix from the Tibbs Bridge Road exposure of the Middle Cambrian Conasauga Formation I came across this trilobite cephalon imprint. It does not seem to match any of the common trilobites found at the site and I could not find a similar example in the various trip reports other members have posted about past visits to the site. Any help is greatly appreciated. Thank you!
  15. Literature: YANISHEVSKY, M (1926). "On the remains of the tubular worms from the Cambrian blue clays". Ezhegodnik Russkogo Paleontologicheskogo Obchestva. 4: 99–112. Korkutis, V. A. 1966. Tubicolous Worms of the Lower Cambrian of the South of the East Baltic territory. Palaeontology and stratigraphy of the Baltic and the Byelorussia. Number I (VI), pp. 7-29. Małgorzata Moczydłowska, Frances Westall, Frédéric Foucher (2014). Microstructure and Biogeochemistry of the Organically Preserved Ediacaran Metazoan Sabellidites. J. of Paleontology, 88(2):224-239 (2014).
  16. While visiting family in Arizona and California I was able to figure out where the Marble Mountains trilobite quarry was located. It's not that far off the road system so I figured I'd give it a look see on my drive from central Arizona to Northern California. The location is only about 25 miles out of my way so why not. On my drive north I only had a few hours so this stop was mostly a fact finding trip. The view from the car windshield. The Marble Mountains are the lower hills to the left of center. The quarry area is just to the left of the gap between hills
  17. Hello All. I am curious as to the groups assessment as to the authenticity of this Acadoparadoxides specimen from Morocco. It measures roughly 13 inches in length (the fossil itself). I see restoration of the right eye (as in right side of the photo) and right portions of the glabella, but beyond that am fairly hopeful/comfortable that the specimen is authentic. It is interesting that an upper thoracic segment is missing, but I am thinking this could be taphonomic or that segment was lost when the rock split. Anyway, I value any thoughts and input. I'm happy to share more photos as well.
  18. Fossilizable

    Cambrian puzzler

    While out on a trilobite hunt several years ago in the Marble Mountains, San Bernardino Cty, CA, I found these two pieces on the surface in the region of a Latham shale exposure, so I think they would have belonged to the Chambless shale, which is in fact exposed as a bluff above the surface. Here's one: Here's the other: I'm not sure about these. They might not even be organic or in the same genus if organic. The source field might be a zone with Chambless and Zabriskie quartzite mixed. So there's a chance they're inorganic, I guess. How
  19. Jasperfossils

    Jince

    Does somebody know if the Jince quarry is still open? Greetings, Jasper
  20. oilshale

    Gangtoucunia aspera Luo and Hu 1999

    Gangtoucunia, a member of the Guanshan fauna, is a genus of worm-like creatures, assigned to the archaeopriapulids on insecure grounds. References: Luo H L, Hu S X, Chen L Z, et al. Early Cambrian Chengjiang Fauna from Kunming Region, China (in Chinese with English summary). Kunming: Yunnan Science and Technology Press, 1999. 129 S. X. HU, M. Y. Zhu, M. Steiner, H. L. Luo, F. C. Zhao and Q. Liu. 2010. Biodiversity and taphonomy of the Early Cambrian Guanshan biota, eastern Yunnan. Science China Earth Sciences 53(12):1765-1773 H.-L. Luo, L. Yong, S.-X. Hu, X.-P. Fu,
  21. Wonderful_Life

    Are these fossils?

    I recently took a trip up to a few localities of the Murray Shale of Blount County, Tennessee, which contains fossils of the early Cambrian period. I looked around in some of the loose shale on the ground to see if I could find a small brachiopod or hyolith (both of which are common to this locality). This was my first time going out and looking to see if I could find a fossil on my own. I took a few pictures of what I thought could possibly be fossiliferous material of some sort, but ultimately could not determine if what I found was indeed fossiliferous. Most of what I saw appeared to be fos
  22. Cynic

    I want to define fossil

    The fossil was found near the Mukhavets River, Belarus, Brest. Length ~ 6-7cm (~ 2.5 inch) whole piece. If I registered here, I will be impudent: you can recommend a book (100 -200 pages), an introductory course in fossils.
  23. paleo.nath

    Nevada Trilobite ID

    I’ve recently bought these trilobites from the Chisholm shale in Nevada, and I was looking for an ID on the two of them. They are Cambrian in age, and more specifically from Lincoln County.
  24. The trace is in the form of a thin, smooth arc, loosely twisted into a right-hand spiral. Literature: Ivantsov, A.Yu., Gritsenko, V. P.; Paliy, V. M., Velikanov, V.A., Konstantinenko, L. I., Menasova, A. Sh., Fedonkin, M. A., Zakrevskaya, M. A. and Serezhnikova, E.A., 2015. Upper Vendian macrofossils of Eastern Europe, Middle Dniester area and Volhynia. PIN, RAS, 144 (in Russian)
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