Search the Community
Showing results for tags 'middle cambrian'.
-
I passed by Quincy today, and I had some time to go there for a bit. Nothing spectacular was found (as usual), but I managed to get some better fragments. I hope there’s still a chance for complete material. I was also planning to check out some other localities, but didn’t have time. Here are the finds, from the wonderful grey day. The leaves were wet, though, and won’t move until probably summer. A bit of hash, two thoracic segments of different sizes, and a cephalic brim of a Paradoxides harlani. Pretty compared to the usual unidentifiable fragments. A very badly eroded ventral cephalon, though you can barely make out the cephalic doublure. Something unusual to change it up, a brachiopod. Very probably an Acrothele gamagei. Wetted for contrast. Two okay partial cranidiums of P. harlani. I was lucky to find the second one, as someone else hammered it on the other side, perpendicular to the bedding. Here’s a nice partial thorax of some small ptychopariid, it’s probably a Skehanos. Wetted for contrast. Lastly, here’s a partial Paradoxides thorax pushed up against a librigena. Unusual to find them in the cherty rocks, because the rock usually splits through the trilobite instead of along it. Not exactly a great specimen, but it is what it is.
- 2 replies
-
- 4
-
-
- masschusetts
- middle cambrian
- (and 2 more)
-
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.
- 177 replies
-
- 7
-
-
- achlysopsis
- acorn worm
- (and 71 more)
-
Today I went back to the spoil piles at Quincy, with some better luck, and weather. I brought bug spray, which helped very much. I’m afraid this gives away too much about the site, but it was a very nice view. A picture of the site. The leaves were quite annoying. Some slickensides and a vug of pyrite which I did not keep, but were cool. On to the finds. I started out in the first few minutes with a lovely Paradoxides harlani left cheek. The rock is not tiny. Some fragments of pleurae. Some hypostomes, showing excellent “terrace lines”. A cephalic doublure, with half of a hypostome. Another more complete doublure. The cephalon might be there, but chances are slim. Some fragments of Skehanos quadrangularis. A cranidium and a heartbreaker thorax fragment. I wish that I had got there sooner, it would have been an awesome bug. A very badly preserved external mould of a Condylopyge eli. Still another species from this site, so I can’t complain. Now for the better finds of this trip. A really nice section of thorax, considering how fragmented this rock is. Four segments, it’s really the best one can expect from here. Not too shabby in terms of size, either. A really nice cephalon, if it were the positive. This one was really a shame, nicely sized too. And lastly, a decently preserved partial cranidium! Nice size, shell, definition, and… …there is a partial brachiopod on the side! I don’t think brachiopods have ever been recorded, or at least discussed from here. Something I never thought I would have found. Overall it was quite fun, I found some better material, and I will definitely return.
- 9 replies
-
- 7
-
-
-
- braintree argillite
- cambrian
- (and 3 more)
-
Burgessomedusa, oldest unambiguous jellyfish newly described
Wrangellian posted a topic in Fossil News
'Swimming Predators' That Lived 500 Million Years Ago Found in Rockies (msn.com)- 2 replies
-
- 7
-
-
-
- british columbia
- burgess shale
- (and 1 more)
-
From the album: My collection in progress
Itagnostus interstrictus White 1874 Location: Wheeler Formation, Utah, USA Age: 507 Mya (Wuliuan, Middle Cambrian) Measurements: 5x5x4,5 cm (matrix), 6x3 mm(trilobite) Kingdom: Animalia Phylum: Arthropoda Subphylum: Trilobitomorpha Class: Trilobita Order: Agnostida Suborder: Agnostina Family: Peronopsidae -
From the album: My collection in progress
Elrathia kingii Meek 1870 Location: Wheeler Formation, Utah, USA Age: 507 Mya (Wuliuan, Middle Cambrian) Measurements: 3x2 cm Kingdom: Animalia Phylum: Arthropoda Subphylum: Trilobitomorpha Class: Trilobita Order: Ptychopariida Suborder: Ptychopariina Family: Alokistocaridae -
Canada/Newfoundland/Cambrian/Middle Cambrian
MarcusFossils posted a gallery image in Member Collections
From the album: My Collection
-
Canada/Newfoundland/Cambrian/Middle Cambrian
MarcusFossils posted a gallery image in Member Collections
From the album: My Collection
-
From the album: My Collection
-
From the album: My Collection
-
From the album: My Collection
-
From the album: My Collection
-
Canada/Newfoundland/Cambrian/Middle Cambrian
MarcusFossils posted a gallery image in Member Collections
From the album: My Collection
-
Hello, everyone! Just got a new, greatly improved setup for photography, and wanted to share some of what I suspect are sponges from the Wheeler Formation. I thought a few might be Gogia (an eocrinoid), but I don't think so. I have many such specimens, but these appear to be the most evident. The first couple are the positive and negative of the same specimen. For scale, they are 8mm to 1cmm in size. All of the other pictures of other specimens are the same size. Enjoy! Though trilobites are spectacular, there is much more to the Wheeler Formation than trilobites, as I shall show you in the next few weeks, maybe months... Debra A. B. C. D. E. F. G. H. I. J. K. L. M. N. O. P. Q. R. S. T. U. V. W. X. Y.
- 18 replies
-
- 1
-
-
- middle cambrian
- new digital microscope and laptop
- (and 2 more)
-
I was recently sent some Wheeler Shale material from the Antelope Springs area of Utah, Middle Cambrian age. Thanks to my good friend Debra @Paleome It's all rather splendid stuff, not the usual Elrathia kingii or Itagnostus interstrictus, but a selection of wonderful more unusual things. But what about this one? A trace fossil of a burrow? Some sort of sponge or algae? Any help will be greatly appreciated, as always. Thank you. The inside of the object is an orange brown colour, while the outside and surrounding regions are sort of beige. It reminds me of some of the staining around fossils where bacteria have done their work of decomposition and left their waste behind as iron sulphides etc. Snake's head? Lots of little black crystals. Pyrite ? This is the inside of the 'burrow' and the divide between the object and the staining : The 'stained' area : Join between stained area and ordinary shale : Looking down into the tube ;
- 16 replies
-
- 1
-
-
- ichnofossils
- middle cambrian
- (and 1 more)
-
I just received a new shipment of matrix/prep material from the Wheeler Formation of Utah this afternoon. What should be looking at me from within the box is THIS! It is huge, about 3 inches wide by 5 inches long, very smooth and flat, with a well-defined margin to it. I don't yet know if I have the other side to it, yet. First, I thought it might be the remains of a jelly, but I don't see any structures within, like concentric rings or radiating lines. Then, I thought maybe it is a cephalon shield or carapace of a very large phyllocarid, like Branchiocaris. I am still feverishly researching every type of Phyllocarid it might be. There is only a very faint area of changing width of slightly darker material, wrapping around the inside of the circumference of its margin/edge. Did I finally get lucky?
-
Trilobites of the United States from my Paleo Archives Collection
Olenellus posted a topic in General Fossil Discussion
Trilobites of the United States from my Paleo Archives Collection (Refer to Attached File) (1) Olenellus clarki and Olenellus fremonti (Early Cambrian), Marble Mts, California (2) Elathria kingii (Middle Cambrian) from Wheeler Amphitheater, Utah (3) Phacops rana milleri (Middle Devonian) of Sylvania Fossil Beds, Ohio (4) Ameura missouriensis (Upper Pennsylvanian), Jemez Springs, New Mexico
- 8 replies
-
- 4
-
-
- early cambrian
- middle cambrian
- (and 2 more)
-
I have just returned from my first visit to a new fossil locality in the Northern Territory, central Australia. The location is around 400km north-east of Alice Springs along some rough dirt roads and once reached, runs for about 10km along the side of the road. When visiting the location today one finds themselves in the very center of Australia and a landscape of flat desert and scrub land, about as far from the sea as possible. In the middle Cambrian the site was very different and home to a vast shallow sea filled with ancient life. Arriving in the late afternoon we set up camp and got prepared for the morning of fossil hunting ahead. I had read about the fossil location from a small local out of print fossicking guide from the 1980's. That lead me to read some of the work done by John R. Laurie who has some papers published online detailing the formation and it's biostratigraphy. We managed to find some good examples of Xystridurid trilobites and stromatolites, all found within a red/white siltstone. There were also a smaller species of Agnostid trilobite, but we found many less of these. Below are some quick images I took of some of the finds, many more yet to properly examine. Also we have some larger slabs of siltstone which we plan to work on. Trip Image Album: The fossil site is found in the location below https://www.google.com/maps/place/21%C2%B042'53.0%22S+135%C2%B039'38.9%22E/@-21.71473,135.66081,1873m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d-21.71473!4d135.66081 In the publication below, NTGS Elk 3 bore samples refer to the location visited. Great trip! Very pleased with the finds and learning more about the geological history of central Australia.
- 10 replies
-
- 4
-
-
- middle cambrian
- trilobites
- (and 1 more)
-
Hi Everyone, I've recently returned from a weekend trip to a fossil site in central Australia. The location contains siltstone laid from the ancient ocean once in the middle of Australia during the middle Cambrian. Both John R. Laurie and Dr P.D. Kruse have completed work on the site and have some publications accessible online. Along with a good collection of trilobites I came across a number of what I believe to be stromatolite fossils. The first image (1.1) was found on the way to the location about 150km before we reached it, the road cut through a much lighter shade of rock outcropping than we had previously seen. The formation appeared identical to the Arthur Creek formation, and judging from the geological surveys I have checked it should be part of the same formation. So keep in mind the first image is not from a known fossil bed, but is only from my best judgement part of the same formation. The remaining fossils in 1.2 are all from the known fossil bed, part of the Arthur Creek formation dating to the Templetonia (middle Cambrian). Top-left looks to me like a very typical stromatolite, similar to what is still seen today in Western Australia. The other fossils seem to me to be either the same stomatolite but seen at a different stage of weathering, or another type of stromatolite. I am interested to hear the opinions of those more knowledgeable! Thanks in advance. Trip Post: The fossil site is found in the location below https://www.google.com/maps/place/21%C2%B042'53.0%22S+135%C2%B039'38.9%22E/@-21.71473,135.66081,1873m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d-21.71473!4d135.66081 In the publication below, NTGS Elk 3 bore samples refer to the location visited. Stromatolite and bioturbated sea floor 1.1 Stromatolites 1.2
- 3 replies
-
- 1
-
-
- australia
- middle cambrian
- (and 2 more)
-
Stromatolites and bioturbated sea floor - Arthur Creek Formation 1.1
JesseKoz posted a gallery image in Member Collections
From the album: Central Australia - Arthur Creek Formation
Stromatolites and bioturbated sea floor from the Arthur Creek formation in central Australia. -
Stromatolite and bioturbated sea floor - Arthur Creek Formation 1.1
JesseKoz posted a gallery image in Member Collections
From the album: Central Australia - Arthur Creek Formation
Stromatolites from the Arthur Creek formation in central Australia. -
From the album: Central Australia - Arthur Creek Formation
Two over-lapping trilobites from the Arthur Creek formation in central Australia. -
From the album: Central Australia - Arthur Creek Formation
Trilobite from the Arthur Creek formation in central Australia. -
From the album: Central Australia - Arthur Creek Formation
Trilobite tail from the Arthur Creek formation in central Australia. -
From the album: Central Australia - Arthur Creek Formation
Trilobite under-side impression from the Arthur Creek formation in central Australia.
