Search the Community
Showing results for tags 'georgian bay formation'.
-
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?
-
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.
- 10 replies
-
- 2
-
-
- georgian bay formation
- ontario
- (and 2 more)
-
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.
-
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
- 15 replies
-
- 2
-
-
- coral
- georgian bay formation
- (and 2 more)
-
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
-
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
- 6 replies
-
- 1
-
-
- coral
- georgian bay formation
- (and 2 more)
-
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.
-
- 1
-
-
- conularia
- georgian bay formation
- (and 4 more)
-
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.
- 7 replies
-
- 1
-
-
- georgian bay formation
- ontario
- (and 2 more)
-
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.© (©)
-
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.© (©)
-
From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Little ripple marks caused by the gentle currents on the shallow late Ordovician sea floor of Toronto. Georgian Bay formation, Humber member(?), Humber River area, Toronto, Ontario. Limestone slab, the coin is a quarter at the bottom for scale. Hmm, I'm beginning to decide if I should have taken this home with me today. Also at the bottom are two clam negative casts: a Whiteavesia and a Modiolopsis.© (©)
-
Ever since summer vacation started I have been free to explore the Humber River area and made frequent hunts there in the late Ordovician rocks of the Georgian Bay formation of the city of Toronto. I realized that I did not have a substantial amount of material from this location that I discovered by accident, and so I decided and started to invest some time in exploring this particular location. Last year I only made seven visits, but I did not hunt productively, as I was in my first year of fossil collecting and as a result I had very little material from this location. I knew this location that I accidentally stumbled on had a lot of potential, considering that a great deal of the original exposures are still intact and there were few disturbances done by tractors, whereas compared to Mimico Creek a great deal of the original and actual exposures have been buried. I made three different visits, the first trip I believe was last week and the third today. On the first trip I only took home three specimens, but gradually as I hit the third visit the amount of my finds increased. On the first trip I only found at least three materials. The first thing that I discovered was a Treptoceras crebiseptum specimen. What made me surprised with this specimen was that this specimen actually had Cornulites sp. attached to it. I've never seen something like this in Mimico Creek. There were tubes of the worm attached on the orthocone and also the orthocone was not squashed flat because of the nature of the shale it is in. Actually, I noticed that certain shales in this location did not squash completely flat the orthocones that get preserved in them, which is very different from Mimico because most of the orthocones I find in Mimico shale are compressed. Sorry if I didn't carry any macro lenses and a good camera to capture the Cornulites, the location's flood from a recent rainfall made the place really mucky and wet and the flood waters were just starting to recede. Out of all the Treptocerases that I discovered on that trip, this was the only one that I decided to take home.
- 18 replies
-
- 1
-
-
- Georgian Bay formation
- Humber River
- (and 4 more)
-
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.© (©)
-
From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Isotelus maximus (Locke, 1838). Big trilobite pygidium molt and the only partial big molt I have ever found at Mimico creek. Approximately 15 centimetres across. Found in Mimico creek, Toronto, Ontario. Georgian Bay formation, late Ordovician. I found this by accident when I first started fossil hunting at Mimico creek back in October 2013. Shale specimen.© (©)
-
- 1
-
-
- Georgian Bay formation
- mimico
- (and 5 more)
-
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.© (©)
- 1 comment
-
- 1
-
-
- georgian bay formation
- Mimico creek
- (and 4 more)
-
From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Cyrtolites ornatus (Conrad, 1838). Late Ordovician monoplacophoran from Mimico creek, Toronto, Ontario. Georgian Bay formation. This one is set on limestone.© (©)
-
From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
A second and more detailed photo of the modiolopsis slab. This one shows a little bit more detail, hopefully. Also, it appears that this thing is not full of modiolopsis as I first concluded, but rather it is full of Whiteavesia pholadiformis. There is also a Cymatonota lenoir, and it appears to me that there is only one specimen of modiolopsis, which would be M. concentrica. Dime shown for scale, and Georgian Bay formation, Mimico creek.© (©)
-
From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Zygospira erratica. These two are set on a limestone hash plate with an orthocone to the left. Both are the same species and have an obvious sulcus. Mimico creek, Toronto, late Ordovician, Georgian Bay formation. Edit: I also have found a massive slab of limestone that had a death assemblage of these brachiopods . I forgot to take photos though , and I'm not sure if the slab is still there.© (©)
-
I made two trips to a place at Mimico creek where a cliff of bedrock collapsed recently and ended up exposing a good amount of fossils. The first trip was on this Wednesday and the other was on today. I mostly found Ordovician bivalves to spice up collection, because my collection lacked pelycopods. The recent rains here in Toronto were the reasons why the bedrock cliff collapsed. And I have to say, the debris that fell was productive!! I ended nicknaming the spot 'Bivalvia Cliff '.
- 20 replies
-
- 1
-
-
- georgian bay formation
- ontario
- (and 2 more)
-
I just wanna share this cuz I never found an endoceras this big before, which is kinda special and unique for me . I was out fossil hunting at the Humber river area here in Toronto with a good exposure back on Saturday and I came across this big phragmocone part sticking out of the bedrock. It was tiring having to dig it out. Siphuncle sticking out Dug out.
-
Hello everyone! At around at the end of August I started making frequent visits to Mimico creek in order to collect fossils before the next winter comes (hopefully it wouldn't be as cold like the previous one was), and also the other reason was because of the developments going on at the creek. I was fearing that they would eventually cover up all the exposures I know of. I made my way through the woods and shrubby areas to reach certain exposures.
-
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.© (©)
-
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.© (©)
