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Showing results for tags 'pennsylvanian'.
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I found this strange Composita subtilita at the Paleo Site bear Kohls Ranch, Arizona. It is from the Middle Pennsylvanian Naco Formation. Does anyone know what’s going on with the strange pattern? Flip side I also should be able to provide slightly higher quality photos if needed, I just reduced the quality to be able to post several PS-I wasn’t sure if I should post this here since I have an ID, so please move it if it shouldn’t be
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This tooth came from the Finis Shale at Jacksboro Texas. That's in the Virgil Series, Cisco Group, Graham Formation, Late Pennsylvanian. It seems large for Orodus variabilis and has some extra odd protrusions on the lingual side that don't match the smaller ones I usually find. Is there another species we can find there or is this normal? @JGM
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Hey all, last week I was visiting my grandma in Arizona, and of course I had to stop at a local fossil spot! I’m just now cleaning up everything we collected (I’ll hopefully post a trip report tonight !!!) and I revealed this little thing from the mud. I believe the brachiopods on the flip side are Derbyia crassa. If you could help me with my little mystery, I’d really appreciate it! From the Pennsylvanian Naco Formation of Arizona.
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Managed to stop in for a little Mazon Creek style Easter egg hunt when I was up in Chicago last June. Brought back maybe a gallon or so of concretions and I've been cycling them in my freezer (when I remember). I like to give them a bit of a (gentle) tap around the edges from time to time. This often helps the concretion to shed an outer layer or to coax a split that is nearly there and just begging to pop. As expected, I've had a number (the majority) of concretions open up to reveal a complete lack of anything at all within. The only thing that revealed itself to be of interest was this little concretion that measures 3.5 x 4.0 cm. I pulled out my copy of The Mazon Creek Fossil Fauna book and you think with that information at my fingertips that I'd be able to make a coherent guess as to the identity of this fossil but I am at a loss to match it up convincingly to any of the taxa described there. Hoping some of the members here with more experience can chime in. @Nimravis @RCFossils @stats @Mark Kmiecik
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- 9
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- carboniferous
- concretion
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Conditions in Western PA have been unusually warm recently, with highs in the 40s and 50s. I decided to take advantage of this warm spell by getting a little bit of fossil hunting in. I decided to do a hunt focused on plants as I’ve been hunting for vertebrates for the better part of the last year and a half and, although I could never get tired of vertebrates I thought some variety was well overdue. So I headed to one of my favorite plant localities in the area. It is located in the Connellsville Sandstone of the Casselman Formation, which is in turn the upper half of the Conemaugh Group. The sandstone is around 305 million years old. The Casselman Formation holds the record of the tail end of one of the largest plant extinctions in our earths history. The prolonged wetness that had existed for much of the Pennsylvanian gave way to dryer conditions, and, as a result, the lycopsid forests fragmented. Many of these lycopsids went extinct during this event, which is known as the Carboniferous Rainforest Collapse. Conifers took advantage of these newly opened ecological niches. Their fossils have been found in this area, although I have never personally found them. Anyway, on to the fossils. Today I mostly found partial Pecopteris fronds, Neuropteris pinnules and Annularia leaflets. I’m going to include some of my better finds from other trips as well, as this trip was rather unproductive. Pictured below is the best Annularia I found today. Or Asterophyllites. I’m not sure. We’ll just go with Calamites leaves for now.
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- annularia
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I found this fossil last year in the Mecca Quarry Shale (Pennsylvanian) of Illinois. I posted it previously but no definitive answer. I got a new digital microscope recently and decided to snap a few photos of this specimen up close. Hopefully they might help, though I still have no idea what it is. Thoughts?
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I found this in our property southeast Oklahoma. The area is Pennsylvanian in age. My first thought was that it may be weathered barite (Rose Rock) which is the state rock. However, they are Permian in age and not found in this area to my knowledge. Now I’m thinking either weathered chrinoid (calyx?) maybe a cluster of burrows, or just a really cool looking rock. Any help would be appreciated. The item is 4” x 5.5” in size.
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Hello from Kansas again. As I posted yesterday in the intro section, my 10yo daughter has stated an interest in fossil collecting. So, I took her out to known spot with a couple thick shale members in the lower part of the Virgilian Stage, so ~305million. We were actually searching the Stull Shale to be exact. Luckily, it had rained a decent amount a few days ago so we just examined the runoff spots. It was pretty run of the mill stuff as far as I can gather but she is really excited and wants to do more outings. I might just have created a monster... Although, there are worse things that she could bug me about. Anyway, on to her finds. I hope I have identified them correctly, feel free to correct me if I'm wrong; I do have a college degree but it has absolutely NOTHING to do with paleontology LOL. I will also post a couple that I am having problems with in the ID section. For reference, all specimens are 2-3cm in length. Crinoids Neochonetes Rhombopora Rugose coral - Most likely Lophophyllidium, or rare chance of a Caninia tip
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I am looking for confirmation on my IDs of these plant fossils, especially what I think is form genus Lepidophyllum. Buck Mountain No. 5 coal mine, Llewellyn Formation, Upper Pennsylvanian, Pennsylvania, USA. Scale in cm / mm. Lepidodendron sp. Lepidophyllum?
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- lepidodendron
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Hi experts, this year during one of my trips to the San Diego Canyon in northern New Mexico, I found this mystery fossil. It looked a lot like a mushroom to me, complete with radial fissures on the surface and a hint of a stalk on the backside. It is about 4cm in diameter and about 1cm thick. Any ideas? Coral? Heavily deformed bivalve? Red herring? Thanks for your input!
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Found this piece just east of Chouteau, OK the area is right on the boundary of Pennsylvanian and Mississippian era rocks but I suspect this plate is Pennsylvanian. There are some pretty cool chrinoid pieces in the plate but I am specifically trying to identify the piece that looks like a piece of barbed wires in the middle of the piece. Archimedes?
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I took advantage of the (eerily) nice weather today to make a trip to my favorite spot, an exposure of the Pennsylvanian LaSalle Limestone near Oglesby, Illinois. I found what appears to be a fragment of bone, or at least that's my best guess. The "inside" is very smooth with some twisting striations running partway down. What's left of the "outside" is porous and purpleish, similar in color and texture to the petalodont roots I find which is why I thought bone. I also found a small fragment (pictured) right next to it that appears to be associated, although I haven't found where the two might join yet. This certainly doesn't look like any shark teeth I've found, and besides the occasional fish scales or tiny indeterminate fragments, I've never found any other vertebrate material. I will say that my first thought was a tetrapod bone fragment as I know at least one such specimen has been found here, but I won't get my hopes up just yet.
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Any idea what these silicified possible crinoids are? Are they even crinoids? They are from the Pennsylvanian Naco Formation from near Payson. The ones in the photos (both sides are shown) are from 0.8 to 1.5 cm wide. @crinus These two references might be of help. Anyone have access to the photos from these? Webster, G., & Olson, T. (1998). Nacocrinus elliotti, a New Pachylocrinid from the Naco Formation (Pennsylvanian, Desmoinesian) of Central Arizona. Journal of Paleontology, 72(3), 510-512. Webster, Gary; Elliott, David. (2004). New information on crinoids (Echinodermata) from the Pennsylvanian Naco Formation of central Arizona. The Mountain Geologist. 41. 77-86.
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This isn't the best field shot and I'm not sure how much I can clean up the specimens I brought home as they appear to be glauconite encrusted. My thought when seeing these was Syringopora. They are both somewhat dome shaped. The larger one is about 6" (16cm) in diameter and half of the bottom is exposed and looks like the top. Some of the indents have tiny crinoid segments captured in them.
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Here are a few holocephalian teeth from the Pennsylvanian LaSalle Limestone from Illinois that I have been unable to ID. I find these teeth hard to ID since the tooth plates of a single species are often so varied in morphology, and I can rarely tell if I'm looking at a fragment or whole plate. Hopefully someone more experienced than I can tell. For the first tooth, I tooth a picture in situ before trying to split the boulder as I was afraid it would crack. Well it did unfortunately and I was only able to save a few pieces. This second tooth looks like Psammodus but I'd love a second opinion (or even a species identification if possible). And this third tooth looks like a fragment, but I really don't know. @Archie @deutscheben Let me know if you have any thoughts. Thanks.
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- chondrichthyan
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Merry Christmas folks. Just wanted to share some photos of one of my favorite specimens.. It's a 3D mold of a Scyphozoa conostichus jellyfish from the Pennsylvanian period from the Nellie Bly Formation, Sand springs, Tulsa, Oklahoma. It's 5.3 x 4.5 x 4.0cm.
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I think this is Odontopteris. The flat leaf tips are what have me thinking that. I have lots of local shale that I can pull these from readily, but maybe once or twice over an hour I can pull one this size out. Any fern experts here able to validate? Attaching a couple fossil plates that I use to identify local ferns.
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I just received this nice Aviculopecten bivalve from Mazon Creek today. What catches my eye is the thing extending from the top of the shell. It almost looks like it could be the siphon protruding outwards. I haven't seen a similar specimen before. Any thoughts?
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- bivalve
- carboniferous
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Here are two Pennsylvanian bivalves I have not been able to ID. I've seen some similar looking ones but in all honesty, I find that most bivalves look the same to me. The first is from the LaSalle Limestone Member of the Bond Formation, Oglesby, IL.
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This nodule split a while ago. At first I thought it was just a neat looking dud, but after looking closer there appear to be faint radiating lines on the specimen which makes me think it might be plant material, although I have no idea what exactly. Any ideas?
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This is crinoid #2 of 3. The information I have is as follows. Topeka Shale, Moline, Kansas, Pennsylvanian. Your help is greatly apricated. I have been wondering about this one for 11 years. I did prep/detail this crinoid.
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I decided to get out for what might have been the last warm day in the 70's (Farenheit) for a walkabout to explore high country access and exit points for some long climbs I would like to do this winter. For this trip I rucked primarily in the lower Pennsylvanian formations looking specifically for a new occurrence of mineral rich shale formations similar to one I had found last year that yielded plant fossils. I did manage to find a small but new-to-me location that was very geologically complex having anomalies in the midst of the shale/sandstone formations. First this Cordaite about 5" tall (12.5 mm) Quite near were numerous Liesegang specimens. This one about 2" x 2" (5mm x 5mm) There seemed to be at least two small areas where hot gasses may have vented through the field leaving small seams of quartz-like material. In one location samples present as Bornite. The largest piece below is 3" x 6" (7.5mm x 15.5mm) The other area was just at the contact zone between the shale having plant fossils and sandstone having plant fossils. This specimen seems to have mostly converted the sandstone and permineralized material into quartz. There is a small specimen of permineralized material left in the lower right corner. Also, there is some mineralization which I believe is mostly iron. As this new location is about 4.5 miles from where I parked my vehicle I did not collect many specimens (small pack) but plan to go back and spend more time searching.
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The next few days are fall break for me, so I'm home from school. I decided to take the day today to explore two sites in Northern Illinois. The first is an outcrop of the Upper Ordovician Maquoketa Group in Kendall County, IL. I learned about this site from a recent trip report posted here, and found it after a little detective work. I was hoping to find Tentaculites oswegoensis, a small conical fossil of unknown affinities which is only found in this area. It only took me a few minutes before I found a few. I only stayed for 20 minutes or so, as Tentaculites is really the only well preserved fossil in these exposures. There were some brachiopod and bryozoan fragments, but nothing noteworthy.
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- bivalve
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Pennsylvanian Road Cut Collecting in Oglesby, Illinois (11-10-19)
Nimravis posted a topic in Fossil Hunting Trips
When I woke up this morning I look outside and saw that it was going to be a nice day in the low 40's and I decided to go out and do a little collecting before it gets really cold and the snow shuts everything down. So i figured why not do the 130 mile round trip to Oglesby, Illinois and collect a nice road cut that I have been to several times that exposes the Pennsylvanian LaSalle Limestone member of the Bond Formation. As with all of the other times that I visited, I was the only one at the site. I only spent about 1 1/2 hours here looking around. I did not collect a lot of fossils, but did pick up a few. If you like brachiopod hash plates, you can find some nice ones just sitting there waiting for someone to pick them up. You do not many weathered out fossils at this site since most of the rockfall is recent, but you can find Composita argentia laying around sometimes- these cool brachiopods pop out of that matrix when struck by a hammer or in natural falls. Here are some pics of the area, hash plates and some small pieces that I collected in the field. Fossils in the head wall- Fossils in the field- Part and Counterpart- Here are some of the pieces that I collected and photographed with a photo cube- Inarticulate Brachiopod- PeltalodusTooth portion- Unknown- Inarticulate brachiopod ? Composita argentia- More to follow-
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