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Showing results for tags 'georgian bay formation'.
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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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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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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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Hello, I want to put together some pics of some of the reef material that I have found in Streetsville, Mississauga, Ontario on the banks of the Credit River. It is now winter and I am missing the warm days in which I can go and wade in the warm waters of the river for fun. I just want to compile and share some specimens that whose photos I have not shared with. All the fossils belong to the Georgian Bay formation, Upper Member, which is late Ordovician in age. First is the common coral that displays an enormity of growth forms, Favistella alveolata (Goldfuss, 1826).
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From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Lingulichnus verticalis (Hakes, 1976). Humber RIver area, Toronto, Ontario, Canada. Late Ordovician, Georgian Bay formation, Lower Member. Oblong to tear shaped burrows made by linguliid brachiopod, species unknown. Approximately 15 cm across. -
Pholadomorpha pholadiformis (synonym: Whiteavesia pholadiformis)
JUAN EMMANUEL posted a gallery image in Member Collections
From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Pholadomorpha pholadiformis (Hall, 1851). Clam found this December 2014, at Mimico creek, Toronto, Canada. Georgian Bay formation, late Ordovician. Was originally in a nodule that was smashed by the erosion.© (©)
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From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Phycodes flabellus (Miller and Dyer, 1878). Georgian Bay formation, Lower Member. From the Humber River, Toronto, Ontario, Canada. Late Ordovician burrows organized in a flabellate pattern. Approximately 10 cm across and in width. -
From the album: Credit River Fossils from Streetsville, Ontario (Georgian Bay Formation, Upper Member)
Homotrypa sp. (streetsvillensis?, Dyer, 1925) Georgian Bay formation, late Ordovician. Plate of unidentifiable bryozoa. Found as a loose specimen on an exposure on the Credit River at Streetsville, Mississauga, Ontario. Approximately 12 cm long and 10 cm wide. Comes from the Homotrypa streetsvillensis zone layer of fossiliferous limestone full of bryozoans. The layer is around 18 inches to 2 ft thick, as described by W.S. Dyer in his "Stratigraphy and Paleontology of the Credit River" on pg. 50.-
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From the album: Credit River Fossils from Streetsville, Ontario (Georgian Bay Formation, Upper Member)
Stromatocerium huronense (Billings, 1865) Late Ordovician stromatoporoid sponge. Found along the Credit River at Streetsville, Mississauga, Ontario. Collected as a loose specimen, most likely coming from the Stromatocerium reef of the exposure this came from. Georgian Bay formation, late Ordovician. There is a tiny Favistella alveolata coral colony growing on the edge of the specimen, perhaps this was a commensalistic relationship? Specimen is 12 cm long. However this species in the exposure where it came from can grow beyond a foot in diameter as mounds. -
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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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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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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When I found this fossil it has some green algal growth on it as I found it on the grass. The algae did not cover the entire fossil but is there some way I can remove the yellow coating of this fossil? I've been scrubbing it with a brush under running water for a while now and some of the dirt does come off.
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Lately if you have seen some of the topics I've started, these trips revolve around an Ordovician reef I came across by the Credit River in Mississauga, Ontario. One of the few things I discovered while exploring these spots is that there are plenty of Stromatocerium sponges which I red is a stromatoporoid. My question is, can anyone lead me to any papers about the growth forms of Ordovician stromatoporoids? I have found specimens of stromatoporoids and from the way I see it, some of the specimens I found of the same species have different growth forms. Some have those things they call monticules on the surface, and some don't exhibit them at all. Instead these specimens exhibit cracks and splits on the surface of the organism with irregular bumps and overgrowths. I'd like to know what causes this. Some of these sponges, from what I have collected, colonize some pieces of Prismostylus on the top.
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Finally Reached That Exposure- Credit River by Streetsville
JUAN EMMANUEL posted a topic in Fossil Hunting Trips
Yesterday, after countless trips and exploring at the same old spots on the Credit River in Mississauga, Ont., I finally mustered the courage to go and wade on the water to an isolated exposure out the Georgian Bay Formation at Streetsville, Mississauga. I wanted to collect fossils that were not worn out as these were all I was finding in my old spots. I have been setting my eyes on this exposure from the other side of the Credit River for some time now ever since I started collecting along the Streetsville area and it could possibly harbour fresh material. The temperature of the afternoon was around 16-20 degrees Celsius so the water was not chilly as I was expecting it to be. I crossed the water barefoot with the water reaching up my knees at this tributary that separated the exposure from the main path. The Credit has many tributaries flowing and where the these tributaries converged the river, many exposures can be found along these places. After crossing I reached the other side without slipping on the slimy bottom. The exposure had thin footing for exploration but I was able to walk back and forth without slipping onto the water..thumb.JPG.92eb43aab8e77866c42e31c8c3ed9a80.JPG)
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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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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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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. -
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. -
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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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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