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Showing results for tags 'ordovician'.
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found this the other day and cleaned it up a bit
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Found this at a site that had a rock slide. The cliff is Decorah shale and Platteville limestone. Thought this was a Rugosa Coral on site. When I returned home and cleaned it up a bit, it appeared like something I had yet to find. It is very thin/delicate and hollow. The other Platteville unknown that I found was this: Will be patiently waiting!!!! Mike
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Yesterday on April 24 I decided to go and visit a place in Mississauga, Ontario called Streetsville which used to be a township of its own before being joined to Mississauga to form the City of Mississauga. I took public transportation to get there and it took me about 1.5 hrs to get there. I went to the Credit River near Streetsville and explored the banks. I had trouble finding a natural exposure as all I was finding were banks with worn out rocks and silt. The river's bottom does not have the same clarity as the Humber River in Etobicoke as I could not see the shale bottom of river. All I was seeing at the Credit's bottom were worn out rocks, algae and silt. The river was also wider than the Humber and in some places it seemed deeper as well which made me think twice about crossing to reach this natural exposure I found. The banks mostly had worn rocks but some nice material can be found. I was surprised at the fauna I found. The rocks are still part of the Georgian Bay Formation but the fossils are completely alien to my eyes. They were nothing that I usually encounter at the Humber River or at Mimico Creek. The place was littered with small coral bits and there lots of what appeared to be Tetradium bits. There also many brachiopod hash plates around. This hash plate here has a piece of coral at the bottom along with many brachiopod bits. There were some things familiar to me like that hash plate of bryozoans and I only found one cephalopod fragment. Where I usually hunt cephalopods are very common to find in Mimico Creek and at the Humber River. There were also these odd trace fossils lying around.
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- corals
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Please send me a PM if anyone wants the paper on this exciting new euarthropod. Siveter, D.J., Fortey, R.A., Zhu, X., & Zhou, Z. (2017) A three-dimensionally preserved aglaspidid euarthropod with a calcitic cuticle from the Ordovician of China. Geological Magazine, (ahead-of-print publication) 15 pp.
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Help with ID on small tube-like fossils or geological items from creek
mossyfern9564 posted a topic in Fossil ID
Hi all, I hope someone can help me ID these items I've been finding for about a year now in and by a local creek in Sullivan County, TN. I've shown them to staff at the Nature Center of a nearby park and to various others who have an interest in such things, and no one has been able to say for sure what they are. I've had theories from corals to beads to stalactites (helictites, actually) to burrow casts. All are tube-like, all have holes through them (a few have one end closed, but not many) some have a bumpy, pebbly surface and some are smooth. The biggest is 1 1/2 to 2 inches in length. The area is known for Ordovician finds, and has a lot of caves and sinkholes. I also find a lot of quartz crystals and small (< 1") geode-type rocks in this creek, and the occasional Woodland period artifact. There is an abundance of chert/flint, and unfinished knapped pieces aren't uncommon. I'm anxious to hear your theories and ideas. Thanks much.
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From the album: Trilobites
Taxonomy: Pseudogygites latimarginatus (2/3 specimen and cephalon) Age: Ordovician (Trenton River Gp) Location: Ottawa, Canada Source: Field collection. Note: The likelihood of finding full specimens as opposed to hash plates of numerous moults is not high.-
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From the album: Trilobites
Taxonomy: Triarthrus eatoni Age: Ordovician Location: Ottawa, Canada Source: Field Collection- 1 comment
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Well every now and then you get lucky and don't even realize it. Was out collecting on Sunday and found what I thought was a few exposed spines of a meadowtownella trilobote. To my surprise when I got home and prepped it , turned out to be something totally different.. Trilo was prepped using 200 mesh dolomite at 20 PSI with a .015 nozzel. Prep time about 15 minutes, very fragile but no consolidant , glue or restoration. Drumroll... as I have never found this species before at this location or anywhere else..... This was found on the surface of a good thousand pound slab in a recent blast pile from the upper part of the verulam exposure at this quarry. Thankfully I had lugged my diamond saw down to the bottom of the pit otherwise this fella would have ended up in the crusher. My buddy Northern Sharks was at the quarry hunting the upper level and never made it down to the bottom (a long trek). I had commented to him over email that I had had a so-so day getting 5 or 6 trilos but nothing spectacular. Now that this is prepped I have changed my mind... I now rate it as a pretty good day. (also found a couple of isotelus, a couple of ceraurus, a very nice syringocrinus and a flexi) I believe it to be an inverted and essentially complete Hypodicranotus striatulus (Walcott) (perhaps pirahna will jump in here with his expertise Notice the partial hypostome whose shape is quite indicative of this species. In fact I may actually have another hypostone in a hash plate matrix that I found a few years ago in the same general that I thought came from a septapsis Trilo is 21mm long by 15.3mm wide
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A little Ordovician collecting at St. Leon and Lawrenceburg, Indiana Roadcuts
Nimravis posted a topic in Fossil Hunting Trips
To begin with I am not an Ordovician collector, but after seeing recent posts from other FF members, I decided to stop at the St. Leon and Lawrenceburg road cuts in Southern Indiana as I was making my way to North Carolina. I will post picks without specific ids, I know I have bryozoans, brachiopods, horn corals- but no trilobites. I did find 3 things that look to me to be possible Cephalopods, but could be mistaken. I also found 1 other item that I have no clue to its I'd. Any help with these last 4 items would be appreciated.
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This is a trip to St. Leon, Indiana (Late Ordovician), that I took on Tuesday the 28th. Weather was cloudy, 66 deg. F. Conditions were wet and muddy, but a lot of fresh material had weathered out and was exposed from the winter. More or less typical finds. The complete Ambonychia steinkern was the trip-maker for me. Here is a view of the roadcut.
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From the album: Ordovician Fossils (by Peat Burns)
Isotelus maxiumus or I. gigas (juv.) (Trilobita) Late Ordovician: Waynesville or Liberty Formation St. Leon, Indiana, USA This is several views of an enrolled juvenile. It is complete except for the missing genal spines, and the exoskeleton is intact. The dark brown areas are pyritization.© 2017 Peat Burns - All Rights Reserved
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From the album: Ordovician Fossils (by Peat Burns)
Rafinesquina ponderosa (Brachiopoda) Late Ordovician: Richmondian Stage St. Leon, Indiana, USA© 2017 Peat Burns - All Rights Reserved
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From the album: Ordovician Fossils (by Peat Burns)
Platystrophia (=Vinlandostrophia) ponderosa (Brachiopoda) Late Ordovician: Maysvillian Stage Kentucky, USA© 2017 Peat Burns - All Rights Reserved
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From the album: Ordovician Fossils (by Peat Burns)
Platystrophia (=Vinlandostrophia) cf. P. acutilirata (Brachiopoda) Late Ordovician: Richmondian Stage Indiana, USA© 2017 Peat Burns - All Rights Reserved
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From the album: Ordovician Fossils (by Peat Burns)
Eochonetes clarksvillensis (Brachiopoda) Late Ordovician: Waynesville Formation St. Leon, Indiana, USA© 2017 Peat Burns - All Rights Reserved
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This polished specimen shows very well the structure of the phragmocone.
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From the album: Ordovician Fossils (by Peat Burns)
Strophomena planumbona (Brachiopoda) Late Ordovician: Liberty Formation St. Leon, Indiana, USA© 2017 Peat Burns - All Rights Reserved
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From the album: Ordovician Fossils (by Peat Burns)
Hiscobeccus capax (Brachiopoda) Late Ordovician: Waynesville Formation St. Leon, Indiana, USA© 2017 Peat Burns - All Rights Reserved
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From the album: Ordovician Fossils (by Peat Burns)
Hebertella cf. H. alveata (Brachiopoda) Late Ordovician: Richmondian Stage Indiana, USA© 2017 Peat Burns - All Rights Reserved
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From the album: Ordovician Fossils (by Peat Burns)
Glyptorthis inscultpta (Brachiopoda) Late Ordovician: Richmondian Stage St. Leon, Indiana, USA© 2017 Peat Burns - All Rights Reserved
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Hi guys I just wanted to share some of the more interesting and unusual cephalopods that I've managed to amass over the past and nearly 4 years of hunting along the creeks and rivers of Toronto, Ontario. I was cataloguing them on my computer and I figured out that I might as well share them. The ones below all came from Mimico Creek. All the fossils belong to the Georgian Bay Formation, and are Late Ordovician in age. A Treptoceras crebispetum (author unknown) covered in an unidentified bryozoan. Length is around 15 cm. My first complete specimen and the same species as above. Complete ones like these found in the shale are often squashed. The body chamber is intact and the specimen approaches nearly 40 cm in length. The smallest complete specimen of the species that I have. This has the body chamber. Length is approximately 10 cm.
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Could this be petrified wood attached to chert/flint? AAA batteries for scale. Size--3" length 1 1/2 "height 1 3/8" thickness
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While doing a little fossil presentation to a local "Intro to Geology" class I did it..... Broke both eye stalks off this Asaphus kowalewskii. Any helpful tips from you folks regarding ways to align and hold the pieces while adhesive sets? And......lesson learned about transporting fragile specimens. :-(
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Ordovician Galena Formation probably Prosser member SE Minnesota For scale note penny at upper left. Below Part 1 Part 2 Part 3 I guess will be in the reply. :-)
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Ordovician Galena Formation, probably Prosser member SE Minnesota Do not know what this is! Fascinating! To me it looks like a tentacled head with bumps facing the bottom of the picture, then a long skinny spine and then a bulbous tail. The rock I've never seen anything like this before in the field or in the books for the Ordovician. Of course, I could be visualizing it wrong. Anyone know what this critter is???
