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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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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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- etobicoke creek
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Lingulichnus verticalis (Hakes, 1976). The elliptical shaped and concave burrows or holes were made by a linguloid brachiopod burrowing in the sediment. I took this plate home as I have never seen so many Lingulichnus burrows on one plate. Rock is limestone and was most likely mud before it lithified. Bibliography: Systematic Ichnology of the Late Ordovician Georgian Bay Formation of Southern Ontario, Eastern Canada, 1998, by D. Christopher A. Stanley and Ron K. Pickerill
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From the album: Credit River Fossils from Streetsville, Ontario (Georgian Bay Formation, Upper Member)
Favistina calicina coral from the Credit River near Streetsville, Mississauga. Georgian Bay Formation, Streetsville Member, late Ordovician. Found as a loose specimen by the banks of the Credit River. This colonial rugose coral is very abundant along the site with many small loose colonies. Some colonies can be found on a limestone matrix. Please click on image sizes to see details of the corallites. -
Side Views of the Prismostylus sp. Specimen
JUAN EMMANUEL posted a gallery image in Member Collections
From the album: Credit River Fossils from Streetsville, Ontario (Georgian Bay Formation, Upper Member)
Side view of the Prismostylus sp. specimen. Credit River near the Streetsville area, Mississauga, Ontario. Georgian Bay Formation, Streetsville Member. Late Ordovician. -
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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- etobicoke creek
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I found this crinoid head on a limestone that belongs to the Georgian Bay Formation, late Ordovician, today at the Humber River in Toronto, Ontario. Is this crinoid a Cincinnaticrinus or a Glyptocrinus? I have included a nickel for size reference.
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From the album: Credit River Fossils from Streetsville, Ontario (Georgian Bay Formation, Upper Member)
Prismostylus sp. found near Streetsville, Missisauga, Ontario by the banks of the Credit River. Top view of specimen. Georgian Bay Formation, Streetsville Member, late Ordovician, Katian. Formerly called Tetradium, this algae was very common to find in the locality I found this in. Small fragments of this algae can be observed on the limestone but I have seen some specimens that are wider than 20-25 cm in diameter. This specimen is a fragment and is around 15 cm at its widest point. -
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. -
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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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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- georgian bay formation
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Hello all! Viola and I went out to our local haunt yesterday afternoon and we found our usual items, but what follows are pictures of a couple of rocks that are a little different from what I'm used to seeing - your thoughts and opinions are much appreciated!!! Monica Item #1: "front" It looks bryozoan-like, but it's a lot bigger than what I'm used to seeing... Item #1: "back" It still looks like a bryozoan but, again, it's quite a large structure overall (even though the filament-type structures are very thin)... Item #2: gastropod - any idea as to what type?
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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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- georgian bay formation
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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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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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Hi everyone! Well, I've "damaged" my first fossil Actually, to be honest, a student "damaged" the hash plate by removing one of the crinoid discs that was on it - I've circled the disc that was removed in the picture below: I know that it's only one of many discs on a hash plate that's full of them, but I'd like to repair it if I can. What would you recommend is the best adhesive to use to re-attach the disc that's been removed? Thanks in advance for your help! Monica
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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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- georgian bay formation
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Hello everyone! Yesterday afternoon I went out to my usual site (Etobicoke Creek, Georgian Bay Formation, Upper Ordovician) and I found a couple of items that I've not found before... Specimen #1: possible trilobite trace fossil (Have I FINALLY found something that is trilobite-related for certain?!) Specimen #2: possible coral - the diameter of the corallites (if that's what they are) ranges from 2-3 mm Thanks for looking! Monica PS - I actually went out with both of my kids yesterday. Viola (almost 6 years old) found her usual stuff - lost of rocks containing crinoid discs. It was the first time I took William (3 years old) with me, and he actually found a fossil all by himself - it's just a rock that once had either a small orthocone nautiloid or a piece of crinoid stem in it, but he's pretty proud of himself
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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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Hello everyone! I went out to my local haunt this past weekend, hoping to find a trilobite, and instead I found another specimen that I had not found up until this point - a coral! It was found at Etobicoke Creek, Georgian Bay Formation, Upper Ordovician. I'm thinking that it is a solitary rugose coral - confirmation of this, or a correction if I'm incorrect, would be greatly appreciated! Here are two pictures of the 5cm X 2.5cm specimen: By the way, would it be possible to identify the specimen down to genus or even species, or (a) is it too difficult to fully identify rugose corals without taking sections, or (b) is my particular specimen too squished to be able to identify it any further? Thanks for your help! Monica
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On Monday Sept. 12 I had some chances to explore zome of parts of the Humber river in Toronto, Ontario, because soon the weather will turn colder and the river waters wont allow exploration. I was walking at a certain part of the Humber river above Bloor St. when I noticed that I could actually see the river's bottom which is made of up shale bedrock. I decided to check the banks from the water. The pictures below were taken when I was in the middle centre of the river where the waters reached up only knee high. Below Bloor St. the water got mucky and there are several marshes lining up the banks of the river. I didn't see any exposures of the Georgian Bay formation at this part and instead I chose to walk north. In addition to discovering the shallowness, I also saw a potential exposure of the Georgian Bay formation, although the exposure could use more erosion to remove all the debris. The area where I discovered the exposure is in a park where all the banks got bulldozed several decades ago to control erosion, which covered most exposures at this park. The exposure revealed limestone layers interbedded with shale. Some of these layers got thicker than 15cm. One limestone layer was fossiliferous which I thought could make some nice hashplates. This limestone layer contained gastropods possibly Hormotoma (?). I have discovered a tiny gastropod hash plate once in Mimico Creek back in 2014 near the mouth. There were also plenty of pelycopods in the layer. I could not recall finding any cephalopods in the entire length of the exposure. A piece of gastropod hash plate I took home. The shells are preserved as internal molds. A Cyrtolites ornatus. I found 2 of these and this was the one I took home. A piece of ramose bryozoa.
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- georgian bay formation
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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)
Isotelus maximus (Locke, 1838). Curled specimen that would have been complete if the head wasn't missing. Spotted among rubble and the first big Isotelus specimen I've found at the Humber River area . Toronto, Ontario. Late Ordovician, Georgian Bay formation. Nickel at the bottom for scale.© (©)
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