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Found 31 results
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From the album Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
The smallest complete Treptoceras crebiseptum specimen in my collection. It even has the body chamber. Length is 10 cm long. Found in the shales of the Georgian Bay formation, Lower Member at Mimico Creek in Etobicoke, Ontario, Canada. Late Ordovician. -
Hello there! I took advantage of the nice weather we've been having to visit Mimico Creek in Toronto, Ontario (Georgian Bay Formation, Upper Ordovician) yesterday afternoon. Here are some photos of specimens that I'd like help identifying - perhaps @Tidgy's Dad would like to have a look? Firstly - the whole rock which contains the bryozoans and the unknown black objects: Specimen #1: a nice branching bryozoan - perhaps Homotrypa? Specimen #2: a nice encrusting bryozoan (there are actually two of them) - perhaps Mesotrypa? More to come...
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- bivalve
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Hi again! Over the weekend, I posted pictures of small fossils in a rock I found at Mimico Creek in Toronto, Ontario (Georgian Bay Formation, Upper Ordovician). I've created this new post just for the shiny black specimens that I found in the rock because a consensus wasn't reached regarding their identity. Each of the two specimens pictured below are 5mm long. My question is: are these items scolecodonts or conodonts? I was leaning towards scolecodonts but I wanted to see what others have to say... Thanks once again! Monica
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- upper ordovician
- georgian bay formation
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Hi all! I ventured out to Mimico Creek in Toronto, Ontario today to look for fossils. It was very cold and the rocks were frozen together, but I managed to pry out one large rock that has some interesting fossils on it. The fossils are from the Georgian Bay Formation (Upper Ordovician). The rock caught my eye because I could spot a few Cornulites flexuosus on one side, but after I brought it home and washed it, I was pleasantly surprised to find that the other side had even more interesting items on it! I'm not exactly sure of what I'm looking at, though, so I'm asking for your help. I'll tag @FossilDAWG since he's quite knowledgeable about fossils in my area Firstly, here's the whole rock so you can get an idea of the size of the fossils within the rock (i.e. they're generally quite small): Now on to the fossils! Here are some shiny black items that I've never seen before, but they look like scolecodont Oenonites sp. - what do you think? (I only circled the items that look sharp enough to be identified - the other black items I'm very not sure about!) Here are a couple of long, thin, and delicate-looking crinoid stems - can they be identified at all? Perhaps something like Ectenocrinus simplex (which does occur in the Georgian Bay Formation)? (The second one is located between the branching bryozoans which I think may be the bryozoan Homotrypa sp.) More to come...
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- mimico creek
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Hello there! Well, I tried to take Viola out for a little fossil hunt by Mimico Creek in Etobicoke, Ontario (Georgian Bay Formation, Upper Ordovician) this afternoon because when I checked the forecast this morning it looked like it was going to be ideal fossil-hunting weather - a mix of sun and cloud with temperatures in the mid-20s Celsius. When we arrived, however, it began to rain - we toughed it out and came away with one piece before it began to pour and we called it a day. I was disappointed since I was hoping to spend a few hours there, but the one piece we took home looks like it might have a graptolite on it, which is quite exciting since I have yet to find one in my local haunts. Please check out the photo below and let me know what you think: Thanks in advance for your help! Monica
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- georgian bay formation
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Hello everyone! On Monday, I found a beautiful Treptoceras crebriseptum orthoconic nautiloid in a huge rock at Mimico Creek in the Etobicoke/Toronto area (Georgian Bay Formation, Upper Ordovician). It has been suggested that I might have a complete specimen, so I was hoping that someone out there might be able to let me know if this is the case or not. Here are some pictures... Whole specimen: Close-up of the base of the specimen (specimen has been turned over) - note that it is smoothly rounded and shows no septa - is this the fossilized living chamber of the animal? Close up of the tip of the specimen - note that it seems to end before the rock edge - is this the very tip of the animal? Close up of the piece that shattered off the tip of the specimen - note that it also seems to end before the rock edge: Thanks for your help!!! Monica
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- georgian bay formation
- toronto
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A very successful hunt (for me) in the Toronto area!!!
Monica posted a topic in Fossil Hunting Trips
Hi everyone!!! I had the afternoon to myself today because William and Viola are at day camps this week and my husband was busy, so I decided to check out Mimico Creek (Georgian Bay Formation, Upper Ordovician) by myself for a couple of hours. I didn't make many finds, but the finds I did make were super-amazing (by my standards, anyway ). As I was walking along the creek when I first arrived, I was checking out the wall of rock when I noticed a pattern: After gently prying out the rock, this is what I found: Hooray!!!!!!!!!! My first Flexicalymene granulosa!!!!!!!!!! For those of you who have read my trip reports and ID requests in the past, especially when I first started fossil-hunting in 2016, I always went out hoping to find a trilobite, and today I succeeded!!!!!!!!!! I then spent about an hour mucking about, not finding much, when I decided to hammer a big slab of rock that had some worn bivalves on the surface. Lo and behold, hidden underneath that layer of rock was the most beautiful Treptoceras crebriseptum orthoconic nautiloid that I had ever seen!!!!!!!!!! The bottom part of the fossil doesn't appear to have septal divisions, and it's a little flatter than the rest of the fossil - could it be the living chamber?!?!?! I cannot believe my luck today - this has been my best day of fossil-hunting in the Toronto area in the past 3 years!!!!!!!!!! I'm so excited!!!!!!!!!! I do have to play it cool at home, though - I don't want Viola to be disappointed that she missed out (I haven't yet told her what I did today - it'll be a secret for a while). @JUAN EMMANUEL @Wrangellian @Ludwigia @Malcolmt - I thought you might like to see- 63 replies
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- mimico creek
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Hi guys, I visited Mimico Creek 2 days after the Canadian Thanksgiving this October which also happened to be a really hot day, which was perfect for exploring. During my time hunting the Georgian Bay Formation of Toronto I would come across these exposures that look “folded”. Does anyone happen to know as to what this really is? Here is a pic I took on that trip I mentioned to show as an example. I would find the same distortion in other parts of Toronto, not just in Mimico Creek, but also in places like along the Humber River and Etobicoke Creek.
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From the album Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Rusophycus osgoodii (author unknown). Found in the Humber River area, Etobicoke, Toronto, Ontario. Georgian Bay formation, Lower Member. Late Ordovician. Trilobite burrow on a limestone with other trace fossils. Dime shown to show approximate size. -
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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- etobicoke creek
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Hello. The attached photo shows two rocks found in Toronto, Southern Ontario, Canada, at Mimico Creek. I juxtaposed the two because it seemed to my amateur eyes that the one on the left might have some similarity in structure to the two "mallet-shaped" structures in the rock to the right. Any help in ID'ing these would be greatly appreciated. Camille
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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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conularia 6.4 cm long, matrix of the specimen 14 cm
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- mimico creek
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From the album Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Endoceras proteiforme (Hall, 1847) with a conical endocone speiss. Found in Mimico Creek, Toronto, Ontario. Georgian Bay Formation, Humber Member, late Ordovician, Katian. Length is approximately 2 feet long. This specimen is a fragment of the larger body. -
Hello once again! Yesterday when I went out with Viola to Mimico Creek in Toronto (Georgian Bay Formation, Upper Ordovician), I found an interesting piece and I'd like your thoughts regarding its identity. The dome-shaped object in the photos below has bumps all over it, and there are tiny pores throughout, so I was wondering if you think it's a bryozoan or perhaps a stromatoporid (apparently Labechia huronensis is a bumpy-looking stromatoporid that can be found in the Georgian Bay Formation, but MANY bryozoans can be found here, too - including on this piece of rock! - so I'm not sure which it is). "Front" of specimen: "Back" of specimen: What is the conical-shaped, segmented item in the upper right-hand corner, by the way? Closer views of the bumpy, dome-shaped object: Thanks for your help! Monica
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- bryozoan
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Hello once again! Viola and I went to a new location for a little fossil-hunting this afternoon, and we think that she may have found a rough-looking trilobite - what do you think? We found it by Mimico Creek in Toronto (Georgian Bay Formation, Upper Ordovician). It's in a massive piece of rock so if it is indeed a trilobite then we'll have to find a way to cut the rock to save only her little treasure Thanks in advance! Monica
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- upper ordovician
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Hi guys I found this trace fossil some days ago and I find this fossil a bit puzzling. I have no certainty as to what creature could have made this. This fossil is from Mimico Creek, Toronto, Georgian Bay Formation, Humber Member, late Ordovician.
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From the album Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Found at Mimico Creek, Toronto, Ontario. Late Ordovician period. This specimen is a positive with a negative counterpart on limestone. This was also found along with a bunch of other Conularia specimens back in the end of Summer at 2015. -
A tergomya mollusc that can be easily found in the Humber Member of the Georgian Bay Formation in Toronto. This one is set on a limestone hash plate dominated mostly by pelycopods. On a personal experience I have come across more Cyrtolites specimens than gastropods at Mimico Creek. Reference: Ontario Department of Mines. The Stratigraphy And Paleontology Of Toronto And Vicinity.
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- georgian bay formation
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A brachiopod that occurs in the Humber Member of the Georgian Bay formation. The species has a sulcus that distinguishes it from the other anazygid brachiopods of the member. Reference: Ontario. Department of Mines. The Stratigraphy And Paleontology Of Toronto And Vicinity.
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- mimico creek
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It has been reported that complete specimens of this species is rare to find in the formation. The Royal Ontario Museum is said to contain many partials and most come from the former Don Valley Brickyard in Toronto. This specimen was found in Mimico Creek. To see details up close please click the full size button. Reference: Ontario. Department of Mines. The Stratigraphy And Paleontology Of Toronto And Vicinity.
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From the album Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Conularia fomosa (Miller & Dyer, 1878). Separate specimen from the previous one but unlike the previous this one is a positive and is 3D but compressed flat. This was found less than 2 feet away from the first one. Found in Mimico Creek limestone of the Georgian Bay formation. Late Ordovician, Toronto, Ontario, Canada.© (©)
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From the album Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Conularia formosa (Miller & Dyer, 1878). Found in limestone at Mimico Creek, Toronto. Late Ordovician, Georgian Bay formation. Species unknown. Negative cast. There are pelycopod molds surrounding the specimen. Note: I was talking to David Rudkin (Assistant Curator, Invertebrate Paleontology) at the ROM rock clinic on Dec. 10, 2015 and showed him the specimens of Conularia and he pointed out that the species that can found in the Georgian Bay formation is C. formosa.© (©)
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From the album Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Caritodens demissa, a late Ordovician bivalve from Mimico Creek, Toronto, Ontario and belongs to the Georgian Bay Formation. A dolostone specimen.© (©)
