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I have satisfied my urge to name most of the brachs I find in the Dundee. This one has eluded me, though. It is very common in the fossiliferous layers. Big ones may be 3 cm long. I only ever find this valve, out of hundreds of specimens. Anybody know what this is? PS. Sorry about the inches on the ruler. 1 inch is about 2.5 cm.
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Dipnoan (lungfish) tooth from the Dundee limestone, NW Ohio.
Curt P posted a topic in Questions & Answers
Greetings. Came across this Dipnoan tooth, (and presumed armor plate) deep in a rock we were searching through. Just wondering about the prevalence of Devonian Dipnoan evidence in our area; especially the Dundee or close by formations.
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I realize it has been a long time since I posted a trip. I've been out about a dozen times so far this season, mostly doing a harvesting and supply run for a researcher to bulk up on some important material. Yesterday I took the dawn train out of the city to poke around one of my mid Devonian hot spots. The material itself can be ridiculously fossiliferous, loaded with a very diverse brachiopod fauna, some corals, abundant rostroconchs, bryozoans, gastropods of all types, and trilobites. My day was mostly spent collecting rostroconch specimens, but also looking for trilobites. This is a high energy environment, so the odds of finding a complete articulated specimen is close to nil. Still, about seven species are present in this particular horizon. I took no site photos, and not even of the very busy slabs. My bad. Kicking things off, some rostroconchs. I've collected quite literally buckets of them from this site in the past, so there was no need to go crazy this time.
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Hi, I found this fossil along the Thames River in London Ontario. The area I'm in is part of the Dundee Formation which is Devonian. Can anyone identify/confirm if this is a Favosite coral? Thank you!
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A recent visit to one of my special Dundee Fm locations yielded the usual assortment of fragments of Coronura aspectans, Pseudodechenella sp. Odontocephalus (n.sp.?), Trypaulites sp., and Crassiproetus sp. This one fragment was found in the talus of my splits (so I could not locate the impression, and it sits on the natural edge of the rock). The material is a near-shore fissile facies of the Dundee Fm (SW Ontario). Comparing against other usual fragments has not made for a satisfactory enough match for me. I'm including a closeup grey-scaled image of the fragment, and a regular photo (which includes a Coronura aspectans pleural segment above the fragment). The pygidial "margin" appears quite a bit larger and effaced. For scale reference, the pygidial axis measures 1.1 cm in length.
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Some interesting finds in the field today, but this one made me wonder if this was a brachidium or some other related feature. It looks like a trilobite, so naturally I picked it up. The piece was long exposed to the elements. Length: ~3cm Age: Mid-Devonian (Dundee Fm, Ontario, Canada).
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Spent the day yesterday with a great field comrade as we gypsied from one prospect to another, spanning locations from the lower Mid-Devonian down to the Mid/Upper Silurian. We pretty much whiffed despite all the driving and multiple locations, but that is the nature of trying to prospect new sites. In the Devonian, we did bump into some fairly substantially sized coral (for all the coral buffs out there). This one from the Dundee Fm runs well down below the shaft of the hammer and seems to have a second "branch" to the left beneath the pick end.
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Took advantage of a break from the early wintry weather to go play in my fossil pit out back (London, Ontario), and came upon this. I'm sure this will be a cinch to identify, but i'm drawing a blank. It has ribbing reminiscent of an ammonite, but this was found in the Dundee Fm, Mid-Devonian, so too old for that. Ammonoids from around these parts don't tend to have ribbing like this, nor the appearance of nodes. I was thinking some kind of coiling gastropod. Too large and flat to be a Paleozygopleurid. If it is a gastro, I know how tough they can be to identify from a steinkern, but I thought I'd give it a go. As I'm one of the few on here who have access to Dundee Fm deposits, perhaps it is reminiscent to a similar Devonian formation where one of you collects. Does this seem familiar to anyone? Sadly, try as I might, I couldn't locate any other pieces from this rock, so this is all I have to go on.
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Post 1/11 Hardly anyone likes a complainer, especially me! The weather around here has been suboptimal for getting out in the field, but whining about it is not going to change that... So I packed my kit, bundled up, and head out back. The temperature is just shy a few degrees above freezing, and there is a big wind and rain warning for the afternoon. It was time to get out for a few hours. Warning: this will not be one of those thrilling trips with envious finds. My goal this time around was to - as much as is possible - be more systematic about the kinds of rock that have been imported to these hills. The rocks range across the lower to mid Devonian, spanning three formations. I've found some interesting trilobite fragments here in the past, but they are few and far between. In terms of trilos, I found nothing of real interest. In terms of finds in general, almost all of it was left in the field. This is more for those who like seeing a slice of Devonian life.
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Yesterday was chopping through some Dundee Fm (mid Devonian) limestone at a very thick brach/coral layer and found a few of these. The matrix where this is situated in this particular layer has abundant large brachs, gastropods, and large well defined coral colonies. I was just curious as to what sort of brach this may be... if it is one.
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