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crinoid stem, ichnofossils, and maybe a hyolith at Etobicoke Creek?
Monica posted a topic in Fossil ID
Hi all! Yesterday afternoon I visited my local haunt (Etobicoke Creek, Georgian Bay Formation, Upper Ordovician) with the kids, and I found a few items that I'd like to show you: Item #1: long crinoid stem - any ideas as to its identity? Item #2: big piece with ichnofossils - item circled in yellow is ichnofossil "a" and item circled in orange is ichnofossil "b" Item #2a: ichnofossil "a" top view Item #2: ichnofossil "b" top view Item #2: ichnofossil "b" side view Item #3 top: two views of a mineral stain that has the shape of a hyolith - what do you think? Item #3 bottom: crinoid columnal impressions (I think!) so it is fossiliferous rock (I think!) so perhaps the specimen above could've been a hyolith??? Thanks as usual for your help! Monica- 7 replies
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ID for dark, flat fragments in Upper Ordovician deposits
David Fankhauser posted a topic in Fossil ID
These are not the largest specimens of this broad flat smooth dark fragment, but you can see some fragments in this sample collected from 9 mile creek just east of Cincinnati. Yes, that is a gorgeous pygidium, presumably from Flexicalimenes? -
Hello! I just came across almost a complete hypostome and a larger wing of the mouth line on a smaller hash plate. Didn't know it until I broke down the matrix. The more I chip away at the plate the more minor trilobite pieces I am finding...which is not unusual. Is there any suggestions on how to categorize and store these??? Sorry for the snarge picture.... Still need lighting in my new manpad.
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Hello again! The weather was warmer today, and since I had the kids to myself all afternoon while my husband went to see a movie with a friend, I decided to take the kids out once again. We first tried to do some collecting at Mimico Creek but were unable to because (1) the water was running too high, and (2) they've been doing some construction work around there which prevents us from getting close to our hunting spot. So the kids played at a nearby park for a while, and when I suggested that we check out Etobicoke Creek again, they were all for it (even William!). There was no ice this time, thank goodness, and what follows are just a few pictures of what I found - enjoy! I hope you're all having a wonderful holiday! Monica Orthoconic nautiloid (Treptoceras crebriseptum) chunk: Bivalve (Ambonychia radiata): Brachiopod (Sowerbyella sericea) positive and negative - the positive is just under 2cm long at the hinge line while the negative is just over 2cm at the hinge line (I'll tag @Tidgy's Dad just because I know how much he loves brachiopods ): Viola showing off one of her finds (another T. crebriseptum) with William joining in on the photo:
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Hi all! I decided to take the kids for a quick hunt at our local spot along Etobicoke Creek before going to see "Mary Poppins" in the afternoon - enjoy the photos (and enjoy the fact that you weren't out there with us - it was SO cold!!!). The rocks in this area are from the Georgian Bay Formation and are from the Upper Ordovician. Monica The kids spent more time breaking ice with rocks than actually fossil hunting (some of the chunks of ice were quite thick!!!): Viola did take some time away from her ice-breaking duties to check for fossils - she found a cute little orthoconic nautiloid: I also found a small chunk of orthoconic nautiloid with the siphuncle visible: I found two pretty nice crinoid stems for my area as well: Additionally, I found a nice chunk of rock with some ichnofossils in it - any ideas as to what made them? Perhaps @abyssunder and/or @piranha and/or @JUAN EMMANUEL can chime in... Finally, I found a rock with some interesting stuff going on within it such as some brachiopod imprints and what appears to be a tabulate coral. This is interesting because I don't think tabulate corals are found in the Georgian Bay Formation - I guess it's a traveler? Any ideas as to the identities of the specimens in the rock, or are they too water worn? Maybe @Tidgy's Dad and/or @Peat Burns can help... Photo of the interesting rock in situ: Brachiopod imprint photo #1: Brachiopod imprint photo #2: Tabulate coral photo:
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I've been sifting through a bucket of dirt I collected on my last dig in Cincinnati. I've come across these two pieces that has me scratching my head. Are they ammonites, snails, arms of a Isorophus? Not the most glorious finds but two that I am having some trouble while cataloging. Thanks all!
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correction for name of nautiloid from the Georgian Bay Formation
Monica posted a topic in General Fossil Discussion
Hello everyone, especially those to whom I have sent chunks of Georgian Bay Formation (Upper Ordovician) orthoconic nautiloids! @JohnBrewer @minnbuckeye @WhodamanHD @VTinNorthAB @Kasia @cheney416 @David in Japan @thelivingdead531 @Tidgy's Dad @Ludwigia @joshuajbelanger Eric, I don't think I sent you any, but just in case... @Wrangellian @DLB - I don't think I sent you any, either, but - again - just in case... (By the way - do you need/want any more fossils for your boys?) I think I've been spelling the name of the orthoconic nautiloid incorrectly!!! I've been spelling it as Treptoceras crebiseptum BUT I've been omitting the "r" that's supposed to come after the "b" in the species name SO the correct spelling should be Treptoceras crebriseptum. I'm SO sorry for the error - I hope you can all forgive me Thanks, Monica- 12 replies
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Hello there! Since the kids are in day camps this week, and my husband was going to see a movie with his friend this afternoon, I took advantage of the available me-time and went for a little fossil hunt at Etobicoke Creek in Mississauga, Ontario (Georgian Bay Formation, Upper Ordovician). I have some ideas about what I've found, but I'd like your opinions, too: Specimen #1: trilobite resting place (Rusophycus, probably made by a Flexicalymene) Specimen #2: I think this is the monoplacophoran Cyrtolites ornatus - it was very flaky and some pieces fell off, but I tried to glue together the larger pieces Specimen #3: brachiopod positive and negative, but the question is which brachiopod? Thanks in advance for your help! Monica
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Hello there! Yesterday, Roger @Ludwigia dropped by for a visit, and we spent the day together checking out my local haunts with Viola. The day started with some coffee and brownies, as well as lovely German gifts from Roger: a Macrocephalites sp. ammonite for Viola (I don't have a picture of it because it's up in her room) and a Brasilia bradfordensis ammonite with a hitchhiking bivalve on the back of the matrix for me!!! See pictures below: We then piled into my car and drove to our first spot: Mimico Creek in Toronto. The fossils here are from the Georgian Bay Formation (Upper Ordovician). Here's a picture of Roger and Viola checking out the site... And one of Roger wielding his hammer... Since I'm still nursing my "fossil elbow", I didn't want to hammer anything; instead, I scraped into the wall of rock and I'm happy to say that I found a couple of sweet little bivalves: one with its two valves partly open (too bad that it's not complete) and another one with some nice ornamentation visible on its shell... @Wrangellian - what do you think? Roger did a little exploring and found some fossiliferous rock further up the wall - I collected two fairly big pieces of this type of rock and, lo and behold, they contained a bunch of brachiopods and their imprints (along with some other goodies)... @Tidgy's Dad - I thought you might like to see them
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Hello all! I was lucky enough to spend the afternoon today in the warm-but-not-too-hot sunshine at Mimico Creek in Toronto, ON (Georgian Bay Formation, Upper Ordovician), and I have a couple of things that I'd like you to have a look at: Picture #1: A view of Mimico Creek Pictures #2 and #3: A bivalve and a possible graptolite - what do you think? Pictures #4 and #5: An ichnofossil - do you think it could be Cruziana, or is it something else? Thanks so much for your help!!! Monica
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Upper Ordovician, Corryville member. Dry Dredgers field trip 4/28/18. Rt. 11, near Flemingsburg, KY. Vinlandostrophia ponderosa and "Solenopora" My shark teeth I won in the annual auction at the Dry Dredgers meeting the night before.
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Hello there! I'm still in the process of deciding which fossils to put in my new display cabinets, so I'm looking for some identification help, if possible. All of the items pictured were found in the Toronto area (Georgian Bay Formation, Upper Ordovician) along creeks or rivers - please help me identify them if you can! Thanks in advance! Monica Picture #1: A trace fossil, but of what? Someone suggested trilobite tracks, but I don't know - what do you think? Perhaps @piranha can have a look... Picture #2: This may or may not be a trace fossil - I only just noticed it today. It vaguely resembles trilobite tracks to me (cruziana), but I'm definitely not sure...
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Hi all! I just got back from a little hunt with the kids along Etobicoke Creek here in Mississauga, Ontario (Georgian Bay Formation, Upper Ordovician), and I'm wondering if I perhaps found a trilobite pygidium? Here are some pictures: Front of rock (lots of little branching bryozoans and some crinoid bits): Back of rock (where the possible trilobite pygidium is located - circled in red): Close-up of possible trilobite pygidium: What do you think? And, if it is indeed a trilobite pygidium, can it be identified any further? Thanks in advance! Monica
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Quite a large specimen even for this quite big species. The length given is of the animal along the centre of its back, not the diameter.
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I found this in an old quarry at the foot of the Old Man of Coniston, Cumbria, England about 30 years back. It's from the Ashgill Shales, so is very uppermost Hirnantian, Upper Ordovician. It was a dome shape but broke during extraction,to reveal a smaller dome within the dome and so on, but is built up of layers and layers though the 'tubes' running through it also continue upwards and outwards from the base. Is it Fisherites ? It's about 3.5 cm in diameter but was a little bit bigger. Thanks for any help. Top : Side : Side and base : Base :
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Hello, Roommates! I received this little trilobite as part of my Secret Santa package, and, though i know the eyes are missing, and parts of the pygidium etc., am rather fond of the little fellow. The label with it said Illaenus americanus and it was said to be from the Galena Limestone, Upper Ordovician nr, Postville, North East Iowa, a quarry or a roadcutting. Now the first thing I discovered, and please correct me if I'm wrong, is that the name is no longer valid and this is now Thaleops laurentiana. And on looking closer, it doesn't seem to be it at all. The lack of axial furrows and general effacement led to me to think Bumastoides sp. so i then read up on the paper https://www.researchgate.net/publication/257656692_A_systematic_revision_of_the_Upper_Ordovician_trilobite_genus_Bumastoides_Illaenidae_with_new_species_from_Oklahoma_Virginia_and_Missouri?enrichId=rgreq-42948ac4406fefc77dead768950eae0b-XXX&enrichSource=Y292ZXJQYWdlOzI1NzY1NjY5MjtBUzo5NzE0MzExMzEyNTg5NUAxNDAwMTcyMTMxNjE4&el=1_x_2&_esc=publicationCoverPdf and so on. I also discovered this (second item down, left hand margin : http://www.robertcharleswolf.net/newsletter942186.htm So it could actually be Maquoketa Formation, Elgin Member. The specimen seems to have 10 segments in the thorax so I'm thinking B. porrectus or B. beckeri. Any help greatly appreciated, here are a few photos:
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The dimensions given are for the largest specimen. The block is 11.5 com at it's widest point by 10 cm and 2 cm deep. Most of the of the other species ascribed to this genus in Morocco are now considered junior synonyms. See https://link.springer.com/chapter/10.1007%2F978-3-319-04364-7_199 Notice that they are all aligned in one direction as they were buried by a mudflow sweeping in from the continent. The arms, bodies and stems are all pretty much aligned. This seems to have occurred fairly regularly in this area at this time. Also notice younger, smaller specimens have fewer plates and arms.
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- ascocystites drabowensis
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HI all! I was just casually perusing my fossils, and I noticed that there are some black fragments on a rock that contains an orthoconic nautiloid that I found at Etobicoke Creek here in Mississauga, Ontario (Georgian Bay Formation, Upper Ordovician). Are these black fragments fossil-related, or are they something else? Please see pictures below: Thanks for your input! Monica
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Hello all! It's been a while since I last put up something to be identified because it's been a very busy few months (we recently sold our old house and have moved into our new house - yay!!!) I did get out with the kids today, though (mainly because Viola has to take her Brownie group's owl all over the place this week, and we thought that it would be fun to take him fossil-hunting ), and there's one potential fossil and one rock that I'd like your thoughts on... Picture #1: Viola with her Brownie group's owl (Oscar) and a fairly large orthoconic nautiloid Picture #2: The potential fossil - could it be part of an Isotelus sp. trilobite? Or is it something human-made? Picture #3: A cool-looking rock - any ideas as to what type it is? Thanks in advance for your help! Monica
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From the album MY FOSSIL Collection - Dpaul7
Calymene Trilobite Specimens Ktaoua Group, Anti-Atlas region, Morocco TIME PERIOD: Upper Ordovician (445-458 Million Years ago) Data: Calymene (meaning beautiful crescent as a reference to the glabella) is a genus of trilobites in the order Phacopida that are found throughout North America, North Africa, and Europe in primarily Silurian outcrops. Calymene is closely related to Flexicalymene, and both genera are frequently found inrolled. Calymene trilobites are small, typically 2 cm in length. Their cephalon is the widest part of the animal, and the thorax is usually in 13 segments. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Phacopida Family: †Calymenidae Genus: †Calymene -
From the album MY FOSSIL Collection - Dpaul7
Calymene Trilobite Specimens Ktaoua Group, Anti-Atlas region, Morocco TIME PERIOD: Upper Ordovician (445-458 Million Years ago) Data: Calymene (meaning beautiful crescent as a reference to the glabella) is a genus of trilobites in the order Phacopida that are found throughout North America, North Africa, and Europe in primarily Silurian outcrops. Calymene is closely related to Flexicalymene, and both genera are frequently found inrolled. Calymene trilobites are small, typically 2 cm in length. Their cephalon is the widest part of the animal, and the thorax is usually in 13 segments. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Phacopida Family: †Calymenidae Genus: †Calymene -
Hello everyone! Now that I've started to split some rocks from my local creeks (Mimico Creek and Etobicoke Creek, Georgian Bay Formation, Upper Ordovician), I'd like some help to identify what I've found. @JUAN EMMANUEL, can you help? Rock #1: This type of bivalve is very common, but I can't decide if it's Ambonychia sp. or Byssonychia sp. The book I have says that they both occur in the Georgian Bay Formation, and they look very similar except Byssonychia sp. "has strong radiating ribs rather than (fine radiating) striae," which is what Ambonychia sp. has. (Hessin, p. 148) What do you think? Rock #2: I've started to find this type of bivalve quite frequently. It looks like the pictures of Cymatonota sp. in the book that I have (Hessin, p. 145), but I'm not sure if this genus exists in the Georgian Bay Formation since Hessin states that "it is moderately common in the Verulam and Coburg formations" (p. 145) but he makes no mention of it occurring in the Georgian Bay Formation. Hessin does state that another similar-looking bivalve can be found in the Georgian Bay Formation: Colpomya sp. (p. 146), so perhaps it could be that? Hessin also discusses a bivalve community that is commonly found in the Georgian Bay Formation that consists of Ambonychia/Byssonychia and Modiolopsis (p. 52), so could this be Modiolopsis sp. instead? As you'll see in Rock #3, the bivalves in Rock #1 and Rock #2 are often found together. Rock #3: "front" - bivalve community, but which genera? Rock #3: "back" - bivalve community (which genera?) along with a couple of brachiopods (I think). It may be a bit too difficult to identify the brachiopods, but I'm hoping that someone out there might be able to - perhaps Onniella sp. or Strophomena sp. for the one on top (positive and negative)? Rock #4: positive and negative of a brachiopod - again, it may be too faint to identify but I'll keep my fingers crossed that someone can help me. Maybe Dalmanella sp. or Paucicrura sp. or Resserella sp.? Thanks everyone! Monica
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Hello once again! Yesterday afternoon I had the kids to myself so I suggested that we head out to our local site for a little fossil-hunting. Viola was game, as usual, but William wasn't interested. I wouldn't take no for an answer, however, and so we headed off. All in all it was a nice few hours outdoors and, ironically enough, William didn't want to leave when Viola and I were ready to go! Hopefully this means he'll be willing to come along more often from now on. I took a few pictures of our outing - enjoy! Monica Picture #1: Viola leading the way Picture #2: William searching for fossils (he didn't find any this time ) Picture #3: A pair of Mallard ducks in the creek Picture #4: A couple of orthoconic nautiloids in a rock that's much too big to take home with us Picture #5: Viola holding up a pretty orthoconic nautiloid that was small enough to take home with us (By the way: you can see William in the background, playing in the creek - he had lost interest in looking for fossils by this point but at least he was finding something to do to keep himself amused!) Picture #6: There's a pretty little brachiopod somewhere in this picture - can you see it? Picture #7: Here's the brachiopod! The rock that it was in was too big to take with us, so we left it where we found it Picture #8: Our little haul of fossils: A - F are mine, G - J are Viola's (she found G, H, I and I found J and gave it to her since she loves her shells ) A, B, and C - snails D - brachiopod E - crinoid stems (I think) at interesting angles F - orthoconic nautiloid G - bivalve imprints (they are pretty faint so we may end up bringing it back to the creek) H - orthoconic nautiloid I - crinoid columnals J - bivalve
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Recently found this trilobite peaking out of the matrix. At first, I was certain it was just a pygidium. After prepping a bit, I was pleasantly surprised that it hopefully appears to be complete. Before progressing with the prep, I would like to ID this so I can prevent any accidents from occurring due to my ignorance. Thanks Mike
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Hello everyone! Ken @digit suggested that I take a few pictures of the play-date that Viola and I had organized this afternoon with one of her friends from her Spark (Girl Guide for 5-6 year-olds) group, and so I did! Enjoy! Monica Picture #1: Viola looking out at one of our usual collecting sites along Etobicoke Creek Picture #2: Viola and her friend washing off a fossil in the creek Picture #3: Viola showing off the orthoconic nautiloid that she found. It's a fairly large piece of rock, so I asked Viola if she was sure that she wanted to keep it - she of course said yes. Then I asked what we were going to do with it - she said that we can put it out as a "family display," so I guess that's what we'll do (as soon as we find a suitable place for it) Picture #4: Viola and her friend traipsing along the rocks beside the creek Picture #5: Me and Viola - I'm holding a rock that contains a couple of brachiopod shells that I gifted to Viola (since, as you already know, she loves shells!) Picture #6: Viola's orthoconic nautiloid that will eventually be displayed for the entire family to enjoy Picture #7: The rock containing brachiopod shells (as well as some other things) that I found as well as a pretty little crinoid columnal that Viola found - both are already residing in Viola's room
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