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Showing results for tags 'Cambrian'.
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Ellipsocephalus hoffi is a common trilobite mainly from central Europe. The slab shows several Ellipsocephalus remnants. Taxonomy according to Fossilworks.org. The systematic position of the family Ellipsocephalidae remains a subject of discussion. Odontogenetic stages of Ellipsocephalus hoffi according to Laibl et al. 2015, p. 5: Identified by oilshale using Laibl et al., 2015. References: SCHLOTHEIM, E.F. (1823): Nachträge zur Petrefactenkunde. Zw. Abteilung, Becker, Gotha, 114 pp. FATKA, O. & SZABAD, M. (2014): Biostratigraphy of Camb
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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.
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- paradoxides series
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A new lower Cambrian Lagerstatte from China! They surmised this was a nursery, but will doubtless add to our understanding of the Chengjiang and Burgess Shale fauna. Interesting there was no mention of the Cambrian explosion. https://www.livescience.com/cambrian-paleonursery-haiyan-lagerstatte.html
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Taxonomy according to Fossilworks.org. Quote from Zhang et al. 2003, p. 447:” The Chengjiang Lagerstätte yields several well-preserved Early Cambrian fossil assemblages (Zhang et al. 2001) from the Yu’anshan Member of the Qiongzhusi Formation in Yunnan Province, South China, consisting of a diverse suite of arthropods (Shu et al. 1995, 1999a; Hou and Bergström 1997; Zhang 1999; Zhang et al. 2000). One of them, small and relatively rare, was only briefly described based on a few specimens (Hou et al. 1991), and repeatedly considered to be a giant protaspis of a naraoiid by many authors (Fo
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There's a lot going on in this rock. Any ideas what the first couple of pics is?
MDS201065 posted a topic in Fossil ID
So, I'm not sure where this rock is from or when, there is cretaceous to Precambrian rock in the area and it's all buried under glacial debris. I've been removing this thing from the rock, the other pictures may be clues as to what this is? -
Gigantic Cambropallas with positive and negative (Real)
TeethCollector posted a topic in Member Collections
This is(or are) awesome gigantic Cambropallas from Jbel Wawrmast Formation, Morocco. The largest trilobite measures 6.5 inches long. The smaller one may measure 4 inches if complete. I know that there are a lot of fakes and heavily restored specimens for this type of giant trilobite. I can say this is absolutely real, cause I was not able to find any evidence of restoration or carving, and there are a lot of incomplete trilobite pieces in the matrix. These are quite heavy and large pieces, so none of my stands can support these. I should get a pair of new stands to- 1 reply
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Spence Gulch site East of Liberty, ID — status
Wendell Ricketts posted a topic in Fossil Hunting Trips
I’m wondering if anyone has collected at the Spence Gulch site outside Liberty, Idaho, in the last year or so and would be kind enough to give me a status report. I have a chance to go before long, but random internet opinion seems pretty evenly divided between “great place, lots of fossils” and “bad quality rock, lots of work for little reward.” I’d be grateful for any help/info. Wendell -
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.
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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?
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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, Wisconsin is well known for abundant ichnofossil impressions of Climactichnites and Protichnites together with hundreds of beached jellyfish. Jellyfish impressions up to 70 cm in diameter were found on several bedding layers, so far the largest jellyfish in the fossil record. The largest recent form, the lion's ma
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Requesting fossil photographs for art project
stefphanni posted a topic in General Fossil Discussion
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! -
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
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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
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From the album: Trilobites
From House Range, Millard County, Utah. Middle Cambrian Wheeler Formation. Thanks to Tony (ynot) for the trade! -
From the album: Trilobites
13x9x2cm. A nice plate from the Wheeler Shale, Middle Cambrian in the Antelope Range, Utah. -
Potential cephalopod from the sub-trilobitic early Cambrian of eastern Newfoundland
Oxytropidoceras posted a topic in Fossil News
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.-
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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.
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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?
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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!
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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!
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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).
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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
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Acadoparadoxides authenticity
Wayan Man posted a topic in Is It Real? How to Recognize Fossil Fabrications
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. -
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
