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I am fortunate enough to have such a huge amount of Middle Devonian Givetian material that I thought it best to put the older Middle Devonian stage, the Eifelian, in its own thread. There are some spectacular fossils here as well though! I thought a good place to start would be in the Formosa Reef, which I believe is quite early Eifelian. This tabulate coral and stromatoporoid reef continues similar complexes found from the Middle Silurian, see my: https://www.thefossilforum.com/topic/84678-adams-silurian/page/3/ thread from page three onwards for details. All these Formosa Reef specimens come from a delightful gift from my good friend @Monica who is a tad busy with life at the moment but is fine and still thinking of the forum. This outcrop can be found on Route 12 near Formosa/Amherstburg, Bruce County, Ontario, Canada. This beautiful-looking specimen came to me with only a third of it revealed but I managed to get it this far after nine days of painful pin prepping. Monica found another one and posted it for ID here: https://www.thefossilforum.com/topic/105528-weird-circular-imprints-formosa-reef-lower-devonian/#comment-1172285 The specimen was identified by another Canny Canadian @Kane to be the little stromatoporoid sponge Syringostroma cylindricum. Hardly a reef-builder, but gorgeous nonetheless. It does have a little thickness to it, but not much. Beautiful! Pretty thin, actually. I love this Monica, thank you!
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I'm in the process right now of sorting out and identifying my finds from the Formosa Reef, Amherstburg Formation, Middle Devon from the roadcut just north of Formosa, Ontario on road #12. These ones here have got me somewhat stumped and I'm hoping that someone can help me out. You can see the 3-dimensionally spiraled gastropod in the following 3 photos, first on the right and then on the left. I'm thinking that it may be a Mourlonia sp., as Tidgy's dad suggested in Monica's report on the site. But what concerns me are the 2 other ones. They are not 3-dimensionally spiral, but rather planspiral, which makes me wonder if they might not be goniatites, even though I can't make out any lobes on them. I haven't been able to find anything like these within this time frame on the internet, so I'm hoping for some suggestions here.
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Today Deb and I made the two hour drive up to just outside the town of Formosa, Ontario, to have a look at the Formosa reef limestone, which is part of the Amherstburg Formation. This road cut is the type locality for this material, and it was humbling to be at the exact same location that researchers of yesteryear such as Ludvigsen and Fagerstrom derived their material that formed the basis of their published work on it. Here are some shots of the road cut. Hardly does it justice. This represents a single, massive biohermal knoll. I've wanted to visit this site for a while now, having read two key papers on it. Most of the non-coral fossils are found on the south edge of the cut, as it is assumed that this was the windward side of the knoll that captured much of the debris swept in by the currents.
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Hi all! After reading about @Kane's autumn trip to Ontario's Formosa Reef (Amherstburg Formation, Lower Devonian), I was inspired to find it and check it out myself. With the help of Ludvigsen's 1986 paper entitled "Reef trilobites from the Formosa Limestone (Lower Devonian) of southern Ontario," along with Google Maps' Satellite View, I was able to locate the reef, so Viola and I made the 2-hour drive yesterday to search the site for some new fossils. Here's Viola standing atop the reef: This was my first find of the day - a rock with a brachiopod AND a gastropod in it - woohoo!!! This was one of Viola's first finds of the day and probably her favourite - a large and beautiful chunk of tabulate coral: Here is a photo of Viola and I just before we left the site after about 3 hours of fossil-hunting: Photos of the fossils to come...
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Hi all! Yesterday I visited Formosa Reef here in Ontario (Amherstburg Formation, Lower Devonian), and I found these weird circular imprints on a few rocks - does anyone know what they are? @Kane Thanks a bunch! Monica photo with ruler for scale: close up photos:
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Acanthopyge contusa hypostome to the ROM
Monica posted a topic in Partners in Paleontology - Member Contributions to Science
Hello everyone! I wanted to share some good news with you all... On Monday, March 16, 2020, I visited "Formosa Reef" in Ontario (Amherstburg Formation, Lower Devonian) for a little fossil hunt. One of the rocks that I found at the site had a trilobite piece that @piranha identified as the hypostome belonging to the trilobite Acanthopyge contusa. When I asked him if he knew of any museum/researcher who might be interested in my specimen, he suggested that I contact the Royal Ontario Museum (ROM), and so I did. First, I emailed David Rudkin, and this is what he said: "Thank you very much for getting in touch and offering to donate your splendid little Acanthopyge hypostome! I've been retired from the ROM for 3 years now and am not permitted to act on behalf of the Invertebrate Palaeontology section, but I am copying these messages to the Curator and Collection Manager with my recommendation to accept your generous offer." "Acanthopyge contusa is indeed a relatively rare component of the Formosa trilobite fauna and the ROM collections do not hold any specimens of the elusive hypostome. Like your contact on The Fossil Forum I've not seen one from Ontario before, so your discovery is quite exciting ... at least for a self-professed trilobite geek such as myself! I'm hoping that my ROM colleagues, Dr Caron and Ms Akrami, will follow my recommendation to accept your offer, but I must leave the final decision in their hands." Just last night, I received two consecutive emails from Maryam Akrami (the current Invertebrate Paleontology Collections Manager at the ROM): "Thank you for sending the images and the information for the trilobite specimen. I am glad to let you know that we will accept your offer of donation. Just want to let you know that the ROM is closed until at least 5th April. If you would like to ship the specimen to us now, I can give you my home address. Once we have the specimen, I will send you a letter acknowledging your generous donation to the ROM." "Following up on my previous email (below), given the current situation and the advise against leaving our homes for non-essential reasons, perhaps it would be a good idea to wait till things return to normal and then ship the specimen to us. I hope that would be ok with yourself." So, once the ROM is up and running again, I'll be handing over my little Acanthopyge contusa hypostome to the ROM! I'll update this thread as soon as the donation has been completed. Here are pictures of the specimen in question: Thanks for reading, everyone! Monica- 49 replies
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Hi everyone! I was just looking through some of my fossils yesterday, and I noticed the following item on one of the rocks I collected from "Formosa Reef" in Ontario, Canada back in March. These rocks are from the Amherstburg Formation and are Lower Devonian in age. Could this be a trilo-bit? Or is it something else? I'll tag @piranha and @Kane to see if they have any ideas. Thanks in advance for your help! Monica The whole rock with the unknown item circled in red: Close-ups and different views of the unknown item:
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