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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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Mannopyge Trilobite Pygidium from Formosa Reef
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Trilobite Pygidium Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario-
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Big Unidentified Bivalve internal mold from Formosa Reef, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Unidentified Bivalve Internal Mold Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario A generous gift from Kane-
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From the album: Middle Devonian
Proteus (Crassiproetus) crassimarginatus Ptychoparid Trilobites Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario Some of these were generous gifts from Kane-
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From the album: Middle Devonian
Cystiphylloides sp. Rugose Coral (cross section) Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario-
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Bellerophontid Gastropods from Formosa Reef, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
"Bellerophon" sp.? Bellerophontid Gastropods Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario-
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Murchisoniid Gastropods from Formosa Reef, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Elasmonema sp. Murchisoniid Gastropods Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario The top center one was a generous gift from Kane-
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Platycerid Gastropods from Formosa Reef, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Platyceras ammon Platycerid Gastropods Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario-
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Atrypid Brachiopod from Formosa Reef, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Atrypa sp. Atrypid Brachiopod Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario-
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Unidentified Bivalve Internal Molds from Formosa Reef, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Unidentified Bivalve Internal Molds Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario The one on the right is a generous gift from Kane-
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Rhynchonellid Brachiopod from Formosa Reef, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Camarotoechia tethys Rhynchonellid Brachiopod Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario A generous gift from Kane-
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Spiriferid Brachiopod from Formosa Reef, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Fimbrispirifer divaricates Spiriferid Brachiopod Middle Devonian Amherstberg Formation Detroit River Group Formosa Reef Formosa, Ontario A generous gift from Kane-
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Ptychomphalinin Gastropod from Formosa Reef, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Mourlonia confertinemilata Ptychomphalinin Gastropod Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario A generous gift from Kane-
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Euomphalid Gastropod from Formosa Reef, Ontario
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Straporolus minulillineatus Euomphalid Gastropod Middle Devonian Amherstburg Formation Detroit River Group Formosa Reef Formosa, Ontario A generous gift from Kane-
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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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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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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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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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