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Showing results for tags 'cambrian'.
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From the album: Pioche Formation
Look at that axial spine! The relief could be better, but this bug is complete! -
From the album: Pioche Formation
Beautifully prepped by Jon! -
Olenellus chiefensis w/ O. terminatus Cephalon
cameronsfossilcollection posted a gallery image in Member Collections
From the album: Pioche Formation
Big chief with uncommon species! -
From the album: Pioche Formation
Complete opsitothorax! My first find out west. -
From the album: Pioche Formation
~3mm -
From the album: Pioche Formation
Nice lil bug! -
Nephrolenellus geniculatus reverse
cameronsfossilcollection posted a gallery image in Member Collections
From the album: Pioche Formation
Look at that curled opistothorax! -
From the album: Pioche Formation
A crazy inflated Neph! The reverse has a wild opsitothorax, while this one has it only partially preserved. -
From the album: Pioche Formation
Big plate of Olenellus preserved in calcite halos. -
From the album: Pioche Formation
A perfect gilberti, preserved as a cast of the arthropod without its mineralized exoskeleton. -
From the album: Pioche Formation
A nice orange fowleri, split this one out of my discard pile! -
From the album: Pioche Formation
The reverse of the perfect gilberti cast. This side has the fragile shell preserved on a thin layer of calcite. -
525-Million-Year-Old Fossil Solves Debate Over Brain Evolution
Oxytropidoceras posted a topic in Fossil News
525-Million-Year-Old Fossil Solves Debate Over Brain Evolution University of Arizona, November 25, 2022 https://scitechdaily.com/science-textbooks-wrong-525-million-year-old-fossil-defies-common-explanation-for-brain-evolution/ https://www.sciencedaily.com/releases/2022/11/221125132137.htm https://www.technologynetworks.com/neuroscience/news/525-million-year-old-fossil-solves-debate-over-brain-evolution-367879 The paywalled paper is: Nicholas J. Strausfeld, Xianguang Hou, Marcel E. Sayre, and Frank Hirth, 2022, The lower Cambrian lobopodian Cardiodictyon resolves the origin of euarthropod brains. Science, 378 (6622), pp. 905-909. 905 DOI: 10.1126/science.abn6264 https://www.science.org/doi/10.1126/science.abn6264 Yours, Paul H.-
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- cambrian
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How Fossiliferous are Cambrian Period Rock Formations in Illinois
Joseph Fossil posted a topic in General Fossil Discussion
I've recently been looking over the geologic formations in Illinois and I found one that's a bit interesting - it's a Cambrian period outcrop but it seems to be a bit small, only found in parts of Ogle and Lee County, Illinois. http://ebeltz.net/firstfam/1stfam.html https://www.osti.gov/servlets/purl/1202269 https://ilstratwiki.web.illinois.edu/index.php/Cambrian_System I haven't heard of a lot of fossils coming from this area so I'm wondering if anyone's been fossil hunting in that region of Illinois before and how common are Cambrian Fossils from Illinois's Ogle and Lee Counties? -
Hello, I thought this was just a crinoid plate when I found it in a creek in Southern Ontario, Canada. Georgian Bay formation. But when I cleaned it up, I noticed these bits radiating out from the central column of these examples. I thought maybe Dickinsonia but I read they were not in Canada. Does anyone recognize these? The big ones shown are about 3cm each. Feels like sandstone. These are the best images I could get with the phone, apologies. thanks in advance!
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Hi I came across this while hunting for trilobites at a commercial Cambrian shale quarry in Utah near Delta and was wondering if it was a monoplacophoran or something else or just an odd rock formation. The shape is concave and about 2 inches in diameter. Any help would be much appreciated. Thank you!
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Fossils date to when Manheim Township was an ocean floor (Lancaster, Pennsylvania, Cambrian)
Oxytropidoceras posted a topic in Fossil News
Fossils date to when Manheim Township was an ocean floor By Joan Kern, LNP, Lancaster Online, October 26, 2022 Pates, S. and Daley, A.C., 2019. The Kinzers Formation (Pennsylvania, USA): the most diverse assemblage of Cambrian Stage 4 radiodonts. Geological Magazine, 156(7), pp.1233-1246. Skinner, E.S., 2005. Taphonomy and depositional circumstances of exceptionally preserved fossils from the Kinzers Formation (Cambrian), southeastern Pennsylvania. Palaeogeography, palaeoclimatology, palaeoecology, 220(1-2), pp.167-192. Yours, Paul H. -
Need some help on these maybe fossils quarried from Blackberry hill, Wisconsin
SilurianSalamander posted a topic in Fossil ID
Found in the side of a building and in the surrounding landscaping. From the Cambrian seashore sandstone of Blackberry Hill Wisconsin. The place is known for its fossils of mass jellyfish strandings and its trace fossils of some of the first arthropods, mollusks, and other animals on land. What are these? Thanks!
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- 500 million years ago
- blackberry hill
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Found on a mountain top in the rockies, any idea what it could be? I was wondering if it could be Cambrian?
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Good evening to everyone who comes to see my post, I thank you in advance for the time you take to read the question you presented, which would be the first of several specimens that I have not been able to identify. About two years ago I started hunting for fossils almost by luck as I was looking for minerals until I found the first turritellas, on one of these trips I find a rock of considerable size and weight with a curved linear pattern similar to "worms" although I honestly don't really know what it is, I have found trace fossils but never horizontal, and less than that thick, I have found specimens of what could be crinoids (or belenmites because of their shape) and a lot of unidentified things due to the large conglomerate in which they are found, what I have been able to identify are trilobite tails and spikes (perhaps), all this separately, never a complete specimen in a type of black rock with a slight percentage of pyrite, a stone very different from the "worm" specimen, which is more of the sedimentary type - quartzite when sectioning this stone to see if other specimens were found in any other layer of this stone I have only counted 2 or 3 oysters of about a centimeter. I found the rock in a river where apparently there is an exposed rocky stratum and in the seasons of crescents they go down with the torrential river. I have found other stones with total conglomerate of oysters others assorted with trilobite tails and oysters and shiny clams, and the aforementioned type of black rock beautifully preserved i have never found a complete trilobite specimen (if this helps in identification) the rocks come down from one area called "eastern mountain range" in Jujuy, Argentina, where several things related to trilobites and a species were discovered (connoisseurs will recognize Jujuyaspis keideli Kobayashi (1936). For the rest, I cannot provide more information since I do not know the real location where this rock came from. I attach the images of the specimen. The rock measures more than 40 centimeters and weighs something around 2 or 3 kilograms. All the best. Thank you!
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From the album: Kinzers Formation
echinoderm? Possibly Camptostroma roddyi Lancaster County, Pennsylvania-
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From the album: Kinzers Formation
Wanneria walcottana cephalon and Salterella Lancaster County, Pennsylvania -
Hi! I would like to know if this trilobite is authentic and if there has been any major restoration. It has been listed as Hamatolenus vincenti, Middle Cambrian, Jbel Wawrmast Formation and is from Tarhoucht, Tinjdad, Morocco. Specimen is about 6.35 cm including spines. As always, thanks for the help.
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Taxonomy from Mindat.org. Diagnosis (Finks & Rigby 2004, p. 28): “Sack-shaped to globular or globose sponges with thin walls of principally vertical, subparallel, monaxial spicules that form tracts around circular canals of at least two sizes; gastral layer a vertical, monaxial thatch that is less perforate; skeleton with weakly developed tufts; marginalia or prostalia absent”. References: Rigby, J. K. and Collins, D. (2004). Sponges of the Middle Cambrian Burgess Shale and Stephen Formations, British Columbia. Royal Ontario Museum Contributions in Science 1:1-155. Finks, R.M. & Rigby, J.K. (2004). Paleozoic Demosponges, 9–175. In KAESLER, R.C. (ed.) Treatise on Invertebrate Paleontology. Part E, Vol. 3 (revised). Porifera (Demospongea, Hexactinellida, Heteractinida, Calcarea). 902 pp. Geological Society of America, Kansas. Wang, P.-li.; Zhao, Y.-long.; Yang, X.-lian.; Yang, R.-jun. (2005), Crumillospongia biporosa (sponge) from the early Cambrian Niutitang biota in Guizhou Province. Acta Micropalaeontologica Sinica 22(2): 196-201. GARCÍA-BELLIDO, D.C., DIES ÁLVAREZ, M.E., GÁMEZ VINTANED, J.A., LIÑÁN, E. & GOZALO, R. (2011). First report of Crumillospongia (Demospongea) from the Cambrian of Europe (Murero biota, Spain). Bulletin of Geosciences 86(3), 641–650 (5 figures, 1 table). Czech Geological Survey, Prague. ISSN 1214-1119. Zhao, Jun; Li, Yujing; Selden, Paul A.; Cong, Peiyun (2020). New occurrence of the Guanshan Lagerstätte (Cambrian Series 2, Stage 4) in the Kunming area, Yunnan, southwest China, with records of new taxa. Alcheringa: An Australasian Journal of Palaeontology, (), 1–13.
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Origin of metazoans as recorded by small carbonaceous fossils - 2022 open access review paper
Oxytropidoceras posted a topic in Fossil News
The comprehensive, open access review paper is: Slater, B.J. and Bohlin, M.S., 2022. Animal origins: The record from organic microfossils. Earth-Science Reviews, 232, no. 104107. open access review paper A related video. Possible sponge fossils in the Tonian of northwestern Canada, Elizabeth Turner, Laurentian University, Virtual Seminars in Precambrian Geology Turner's open access paper is: Turner, E.C., 2021. Possible poriferan body fossils in early Neoproterozoic microbial reefs. Nature, 596(7870), pp.87-91. Yours, Paul H.-
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