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From a sparsely fossiliferous shale above the Great Limestone (U. Mississippian, Pendleian) in Co. Durham, England. Found a couple of weeks ago by a streamside while walking the dog on the moors. It's the spiniest specimen of Eomarginifera longispina that I've seen - a common species but usually found with not much more than the bases of the rather sparse spines preserved. When rough prepping it with a pin vice, the long spine appeared first and I only later realised it had the hinge spines at the top. They're tubular and rather crushed. Like many productids, the spines are only on the ventral valve so probably more to do with support/anchorage in the mud than with protection. Scale in mm From the Treatise, the same species with typical spine bases.
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Hi All. I am heading to the NAPC meetings in Michigan in June. Unfortunately the field trips filled up fast. I am hoping to take in a little local fossil collecting in the area if possible while there (anything really). If anyone has any suggestions I would love to hear from you. If you live in the area or are attending NAPC and want to organize an informal collecting jaunt I am happy to do that too. Thank you for the help!
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Sacramento Mountains - New Mexico, Ordovician - Mississippian exploration
Kato posted a topic in Fossil Hunting Trips
This was purely an exploratory hike to a remote area with no expectation of finding much. In that regard, I was not disappointed. I'd previously last covered some of this ground about 5 years ago and had forgotten how formidable it was to get into. The walk in a rocky canyon bottom for about 2.8 miles before taking another rocky side canyon ending at an Ordovician-Silurian dry water fall. Approaching the base of the dry water fall with Ordovician bedrock that was pretty much non-fossiliferous. At the base of the dry water fall to get a nature shot. This looks like it should be climbable and, perhaps it is, but I'm getting a bit too long in the years for such risky business. I took a bushwhack side trip up a steep hill. Fortunately, it had rained recently and the otherwise loose scree was a delight. Even if one could climb the lower falls they are faced with an unclimbable Silurain vertical wall. A view of that dry fall from the other side.- 9 replies
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Daylong collecting hike - Sacramento Mountains, New Mexico
Kato posted a topic in Fossil Hunting Trips
It's been several years since I've last posted. Had a bit of run-in with a medical issue that took me offline for awhile. I seem to be doing better and have been able to complete a daylong ramble in the local hills albeit at 70% of my former capacity. This trip is in the Sacramento Mountains and covers the hike into the Mississippian Lake Valley (MLV) Formation, specifically the Nunn Formation for collecting. The MLV is the last of the formations in the Mississippian locally. After that I ascended into the lower Pennsylvanian known as the Gobbler Formation here. The two Covid years + my own medical issue brought about a lot of negative trailhead access issues. The detours around these now restricted areas add to the hike length sometimes quite measureably. Once into the distant hills away from humanity things look much brighter. The following is a shot back into town and the White Sands National Park (thin white strip in the distance). I'm standing on the Nunn Formation of the Mississippian Lake Valley Formation. If you can't find a crinoid, horn coral or spirifer here you simply are not trying. A couple of crinoid hash slabs picked off the ground. There are plentiful root and stem pieces but intact calyxes are difficult to find and usually quite small (15mm). -
Sorry for no scale I am in the bush currently, these are in Mississippian strata In one area, Indiana are these worth taking? They look like plants
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From the album: Mississippian fossils
A nice calyx I'm working on cleaning up.-
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From the album: Mississippian fossils
A common calyx I recently cleaned.-
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From the album: Mississippian fossils
A nice little calyx I finished cleaning.-
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From the album: Mississippian fossils
Another large Eutrochocrinus calyx I cleaned.-
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From the album: Mississippian fossils
A large Uperocrinus pyriformis calyx I cleaned.-
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From the album: Mississippian fossils
A large Eutrochocrinus christyi calyx I cleaned.-
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I found multiple pieces of this rock which each vary in size but the shape and structure is the same. There is banding and in the middle of each is a cellular structure looking material. Is this some sort of plant? I am in Mississippian strata Indiana USA
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From the album: Mississippian fossils
I acquired this specimen from fellow member @Brian James Maguire, who collected and polished this beautiful piece. The colors are outstanding! Thanks again for the amazing addition to my odd brachiopod collection.- 2 comments
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From the album: Mississippian fossils
A good view of basal plates of a Phanocrinus crinoid. -
From the album: Mississippian fossils
A nice little Phanocrinus crinoid calyx. -
From the album: Mississippian fossils
A superb Ameropiltonia lauradanae trilobite.-
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From the album: Mississippian fossils
A nice Deltodus toothplate I found on my hike through a creek today.-
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From the album: Mississippian fossils
Here is a cute little Comptonaspis pygidium I found on my last hike.-
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My Keokuk Limestone finds from this fall have now been cleaned and identified. I am struggling with a few and am reaching out for any suggestions to identification. Thanks!! 1. First up is a blastoid that can't be matched well with the three species to occur in the Keokuk. It is probably a weathered sample that makes identification tough for me. 2. A crinoid cup that I do not recognize. It is very round and smooth. Maybe it isn't a crinoid cup! 3. A second crinoid cup I can't identify. 4. A large gastropod that spirals backwards to most gastropods. Reminds me of Maclurites if this was Ordovician. Straparolus looks similar but spirals normally. 5. And finally a specimen I thought was a fenstrate bryozoan until I looked closely and saw it lacked the netted appearance. Maybe a dendroid graptolite?
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Micro heteromorphic silicified ?gastropod ?microconchid Mississippian, England
TqB posted a topic in Fossil ID
Does anyone recognise this tiny silicified shell? It's about 2mm long. I haven't seen one like it before from the Carboniferous. From the Great Limestone (upper Mississippian, Pendleian Stage) from Weardale, Co. Durham, England. From a piece I've been dissolving in acid, containing silicified brachiopods, gastropods etc. It starts off with an open helical spiral (3rd photo) and then straightens out. It also has clear annular ribs. Although the preservation is imperfect and sugary, I'm sure it's shell replacement rather than internal mould, judging from other fossils in the pece. The various serpulid-like gastropods and microconchids I've come across elsewhere don't have the regular ribbing.- 4 replies
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I've been chipping away at this cobble when I have spare time, and slowly exposing this fossil. I found the stone itself in western Illinois, relatively near the rivers. The matrix is shockingly tough, I can only rarely make a difference with any sort of precision, unpowered hand tool. Each grain of sand is firmly in place and does not want to leave. The exposed matrix was originally reddish to brownish, though newly exposed faces of chips broken off lack the red-brown color (the reddish color is entirely lost in the photos). Presumably the stone is Mississippian or Devonian. Other fossils in this rock are all flakey white brachiopod material ranging from 0.5 cm to 4 cm across at the widest points. I have tested some matrix scraps against vinegar, which dissolved the stone around the sand grains, but left the sand grains untouched. I've decided to hold off on any more matrix removal until I know what I should expect to find in the matrix. I found a second one of these, but it chipped off and lost it in my prep area outside. When it comes to the horses & zebras adage I always put more consideration into the zebras than I should, which is why I'm hoping this is some part of a vertebrate but more likely an oddly colored crinoid bit. We just don't have much vertebrate material where I'm at. The photos with circular borders are taken through a stereoscope at 15x magnification. The others have some level of digital zoom applied, but have a scale nearby (mm, cm). I apologize for any focus issues, this new phone has a finicky camera.
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@CabinetOfCuriosities recently posted a Devonian bone for identification. Having just read the post, I headed downstairs and split open a piece of matrix from the fish layer of the upper Burlington, lower Keokuk Formation and a boney looking fossil presented itself. What a coincidence! It vaguely mimics turtle remains I have found in Florida. Thoughts of what this is are welcomed!!!!!! By the way, the size is 2.5 by 2.0 cm.
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Here is another black mass that emerged from the light colored matrix of the Burlington Formation. Pareidolia has me envisioning a tooth with the enamel peeled away on top and side projections. If it wasn't so fragile, I would prep around the other side. This measures just under 2 cm.
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From the album: Mississippian fossils
A bit weathered, but still a nice ventral example of this species.- 2 comments
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