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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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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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Treptoceras crebiseptum (Hall, 1847). A nautiloid found in the shale of the Georgian Bay Formation, lower informal member, at a shale wall. Locality is Mimico Creek, Etobicoke, Ontario, Canada. I have included in situ pics to show the process of collecting the specimen. The length of the orthocone is approximately 40 cm which is the size of an adult Treptoceras crebiseptum.
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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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Conularia formosa (Miller and Dyer, 1878). Specimen with a positive and a negative counterpart (matrix). Found while smashing a limestone layer at Mimico Creek, Toronto, Ontario. The matrix of the Conularia has the negative on it, as well as bryozoan bits. Bibliography: Ontario. Department of Mines. The Stratigraphy And Paleontology Of Toronto And Vicinity.
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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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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.-
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From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Flexicalymene granulosa, Mimico creek, Toronto, Ontario. Georgian Bay formation, late Ordovician. Complete specimen still embedded in the shale. Will need prep work to be exposed. I found this one at a collapsed cliff of shale at Mimico creek. I found some flexi's this summer at Mimico creek but usually whole specimens start crumbling apart the moment I try removing the matrix around the specimens.© (©)
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The first major event to wash the creek was the nasty February winter we had in the city. Let's recall the ice that melted and went down the creek back in March. Then fast forward to June. I believe the city had rain during the first 2 straight weeks of June in which I remember seeing many creeks being flooded continuously for several days. Then gradually the rain stopped, I waited for some time to give the creek's water level to drop low again, and that's when I set off to visit the ravines of Mimico Creek.
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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.- 2 comments
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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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Endoceras proteiforme with Endocone Speiss
JUAN EMMANUEL posted a gallery image in Member Collections
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.-
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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.© (©)
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From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
The unprepared and complete Flexicalymene granulosa trilobites all together from Mimico creek, Toronto, Ontario, Canada. Late Ordovician, Georgian Bay formation. All three were found in shale but I also found a complete one once on a limestone.© (©)
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From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Modiolopsis ovata Whitella sp. found at Mimico creek. Internal mold of a clam valve. I picked this up from the bottom of a collapsed cliff. Georgian Bay formation, late Ordovician, Toronto, Mimico creek. I put a dime next to it for size.© (©)
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From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
A slab full of late Ordovician fauna of the Georgian Bay Formation of Toronto, mostly containing whole complete Modiolopsis. Found at a collapsed cliff of shale at Mimico creek. Many specimens have crushed parts and their bits of crushed parts got thrown all over the slab, so probably this was a storm turbulence-caused death.© (©)