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Showing results for tags 'Pennsylvanian'.
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I could use some help confirming the identities of these brachiopods from the Harpersville Formation (Upper Pennsylvanian). Using the slide deck for brachiopods on the DPS website I made a best guess. I would love to know if someone has different thoughts. Any help would be greatly appreciated. Thank you! #1- Marginifera fragilis #2- Desmoinesia muricatina #3- Hystriculina wabashensis
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For the most part, fertile ferns are rare in the Mazon Creek flora. The only exception being Diplazites, of which ~1/2 of all specimens are fertile. This is my first non-Diplazites fertile fern. I really like the interplay between the white mineral deposits, the brown matrix, and the scattered pyrite crystals - a very artistic specimen I think. My best guess is that this is Cyathocarpus hemitelioides, but I am not positive. Close up of a fertile pinnule Close up of sterile pinnules at the base
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- carboniferous
- fern
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Hi! I was collecting plant fossils and found these shells. They are Pennsylvanian (Carboniferous), Conemaugh Group, Glenshaw Formation. I don't know what they are. Any help is appreciated, thank you.
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- bivalve
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Here is an odd-ball I found yesterday. Recently I found a new marine / brackish layer of dark gray shale. My first discovery was two root pieces, which I'll showcase at another time. I also found a tiny Glabrocingulum grayvillense (gastropod) there. This particular rock had a brachiopod on it, and I was getting a closer look. The matrix was soft enough to stab with my tweezers, so I was digging around the margins. This very tiny piece appeared that looked very interesting, and even more complex under the microscope. It's very small. The further out photo shows it with a 1 cm scale. I feel like this is a known marine animal shape, but It's not apparent to me. You can see the opposite part of it on the top right of the following photo as well.
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- brush creek marine zone
- carboniferous
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Over a couple of trips to several exposures of the Late Pennsylvanian Colony Creek Shale, I have collected a few larger brachiopods that I am not completely sure of an identification for. I was hoping that someone might know what these are. Any help would be greatly appreciated. Thank you so much! #1- ??? #2- ??? #3- Antiquatonia portlockiana? #4- Kutorginella lasallensis?
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A Fossil A Day....keeps the blues away! Or something like that... I started an Instragram account (jamielynnfossilquest) and am posting a fossil a day, so I figured I should do that on here, to REAL fossil enthusiasts! I'm a few days behind, so I will start out with a few more than one a day but then it will settle down to One Fossil (but I will admit, I'll probably miss a few days, but I'll double up or whatever.) I'll start with Texas Pennsylvanian era, but will branch out to other locations and time periods, so expect a little of everything! So enjoy A Fossil A Day! Texas Pennsylvanian Fossils: Nautiloid Agathiceras ciscoense Brachiopod Neochonetes acanthophorus Trilobite Ditomopyge sp. Gastropod Straparollus sp. Bivalve Astartella vera Cephalopod Brachycycloceras sp, Brachiopod Cleiothyridina orbicularis
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- collection
- cretaceous
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This one has been sitting in my "interesting but I have no clue" pile for a while. When I found it, I was splitting limestone laying in the stream. I've found that when you split limestone, immediately after splitting you'll get a couple moments of a sharp looking specimen before things start to oxidize. The limestone is a very dark gray, or almost black color. You either see black limestone or white calcite pieces while splitting. I split this particular piece open and right in the middle was a 3-4 cm long, 8 mm wide gold looking rectangle in the middle of the flat broken limestone. I thought I wouldn't get to recover it, but one hammer hit later it popped out and I was able to save it. I do find that plants in the limestone seem to get the gold or pyrite type preservation. I've found one small straight shelled cephalopod preserved like this. But overall, it's very rare here. I have maybe 3 or 4 larger pieces of what I'd called pyrite type material I've recovered. Below are some stacked microscope photos of it. The scale in the first photo is 1 mm for each mark. You can see the grain that runs left to right. This looks like wood to me, but I haven't had that confirmed before. The next two photos are a view looking from the bottom to the top of the first photo. What has me most curious are the perpendicular grain marks that are found in this area. They don't seem to just be on the outermost layer, as you can see more deeper. I'm not sure if this is some sort of perpendicular crystal pattern, or it's just the shape of the original material that was replaced with the mineral. And maximum zoom. A stack of 12 microscope images taken through the lens in the same area of the above photo. And that's it. Is this a small piece of woody material that was preserved in the sea? I wonder if vinegar would clean this up or destroy the mineral as well.
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I found this over the weekend at Wilson’s Clay Pit (Harpersville Fm, Pennsylvanian). I know that there are a number of strange looking rocks there that look like something but are really nothing. I ended up picking it up and keeping it because it was unique and I thought that it could maybe be something. Does anyone know what this could be? Is it just one of those rocks that look like something but is really nothing?
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Late August found me traveling to Mazon Creek for a wonderful hunt. See @RandyB's topic, Mazon Creek 8-28-21. The trip allowed a little free time to slip off and explore the road cut in Oglesby, Illinois. This is a very fossiliferous exposure and was enjoyable to explore. The fact I found shark teeth and crinoids makes me think this was a combination of Pennsylvanian La Salle Limestone unit 3 and unit 4. Even though my poor photos do not show it well, the brachiopods are very nice. But unfortunately, identification has been difficult. For those of you, like me, who enjoy geodized fossils, this formation is a great site to visit. Other brachiopods that I couldn't definitively identify. #1 #2 #3 #4 #5
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- illinois
- lasalle limestone
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5 Mazon Creek specimens that need confirmation or species ID
Mark Kmiecik posted a topic in Fossil ID
Hoping for confirmation and/or species identification. Thanks in advance. Not sure of much anymore with all the recent changes. Annularia inflata? Alethopteris serlii? Calamites cistii? Pecopteris? Crenulopteris? species? Pecopteris? Crenulopteris? species?
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- alethopteris
- annularia
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While visiting in Rhode Island recently, my wife and I spent a few hours on the beach at the end of Corys Lane in Portsmouth. While it isn't one of the most productive sites I've had the pleasure of mucking around in, I always feel at home at the edge of the sea. It's a bit of a challenge to find any reasonably well-preserved fossils here, but the challenge just makes it all the more enjoyable. While my wife wandered away, deserting me once again for the lure of an ocean beach, I spread out a square of 4-mil plastic in the always futile attempt to keep the graphite-infused beach gravel off yet another pair of too-good-to-throw-away jeans. The overburden of beach-tumbled shaly gravel and slipper shells (Crepidula) was only 6-inches (15cm) deep here, blanketing a promising layer of Pennsylvanian age shale. Thankfully the tide was low and I could dig without the need to drain water out of the excavation. Regretably, I left my phone/camera in the car and have no current photos to share today, but here's one I took a few years ago: I've had mixed results here at this site, with nothing worth keeping on occasion. This day's finds were slightly above average, by my reckoning. Most of the shale I was uncovering was much too fragile to recover any recognizable plants, but after prying out and splitting a few solid slabs I did come home with some rather nice pieces, even if the preservation wasn't quite as good as I would prefer. I haven't been able to identify these seed ferns. Maybe a species of Pecopteris? The details just aren't preserved very well. The preservation is better in this harder rock. I think these are Cordaites principalis leaves. And a couple additional unknowns: The best find of the day, a modern skull, was found, of course, by my wandering wife. I believe it was formerly put to use by a sea robin (Prionotus carolinus). It was a good day.
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- corys lane
- ferns
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The smaller specimen pictured opened this morning and reminded me of the larger specimen which I found earlier this year. They are very similar looking. My first thought was Cordaites borassifolius due to the linear striations, but the specimens are fragmentary and the preservation is not great so they could also just be indeterminate wood fragments. I don't think I've seen a Cordaites specimen in person before so I am not positive either way. Any thoughts are appreciated.
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- carboniferous
- illinois
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I collected this specimen last year but still can't decide on an ID, it's pretty fragmentary. Any thoughts are appreciated. @bigred97 @flipper559 @stats @Nimravis @deutscheben
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- carboniferous
- flora
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I've spent some time gathering at the plant layer locally. I was able to pry behind the layered shale and pull out some larger pieces unbroken, and also split them. The layer is a delight, just about any piece I recover has some sort of plant impression on it. Immediately below the layered shale there is a more nodular type of rock that no longer breaks apart in neat and tidy planes. So whatever environmental change happened, it happened right at this layer. The first one was a really long and well defined fern frond. The carbon is all still in place. I want to create a parallel cut to remove this part of the specimen, then catalog and store it. I am hoping I can do so in a way that won't dust over the carbon and degrade it. The rock that covered this was a physical impression of these leaves in the rock. It appears more could be exposed at the bottom, but it's not easy to do. The second specimen is a preserved fern frond with very tiny leaves. The larger leaves stick out, but a more complete arrangement like this is very pleasing to look at. The iron staining at the bottom creates almost a work of art. This specimen has a small root or similar structure at the bottom right of the photo. There are repeating points towards the bottom with larger circular structures at the top. These huge fern leaves showed up right before I was done searching during this particular session. Both sides are shown. It would be interesting to know if it continues on in the other direction.
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- carboniferous
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I'm getting better with plants, but I haven't really found anything that says seed or spore pod to me. This one finally does. It's a small depression with texture. I wish I had the other side, but I didn't see it. This was from a layer with many ferns, Calamites, and Cordaites. Concretions are about non-existent here. In fact, there may be none at all. It's the texture in the depression that has me thinking seed pod mold.
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I found this a few weeks ago at an exposure of the Late Pennsylvanian Colony Creek Shale in west-central Texas. I have no idea what it could be. It seems like a partial something, but I just don't know what. Maybe some type of cephalopod? Any thoughts are greatly appreciated. I thought the pattern was interesting enough to pick it up and try to figure it out. Thank you!
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Pennsylvanian Caseyville Formation Lepidodendron aculeatum
Raistlin posted a topic in General Fossil Discussion
Trying to decide. Do I leave the piece as is or expose the bit under the rock. There are other plant bits to the right of it that I feel adds to the piece overall. With just enough room to maybe not be damaged if prepped. The last two pics are to the right and on the backside.
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- caseyville
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Best I can do is call it a stick.
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Since they are so common, I don't keep many coprolites unless I notice they have interesting inclusions. This is one of the more interesting inclusions I've found to date. It measures maybe 2mm in length. I believe it is the branchiopod Pemphilimnadiopsis ortoni (what a name!), and was hoping for a second opinion. @deutscheben, I know you've found some of these before. Any thoughts are appreciated.
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Howdy! This specimen comes from the Pennsylvanian Period, Conemaugh Group, Glenshaw Formation, in the Mason Shales below Brush Creek Limestone. The area has a lot of Pecopteroids, Neuropteroids and Calamites. However, I've been informed that it is not Calamites. I should also note that this piece was part of a larger fossil cast that was crumbling apart when I found it, and unfortunately, I was unable to save the rest of it. The last picture is the back side. All help is appreciated and thanks in advance!
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- carboniferous
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Hi. The geological info for this find is: Pennsylvanian (Carboniferous), Conemaugh Group, Glenshaw Formation. I've been digging at an outcrop near a local stream and finding a lot of pecopteroids, neuropteroids, calamites, some sphenopteroids and possibly lepidodendron/stigmaria, sigillaria and cordaites. Recently the rain washed away the dirt at the base of this outcrop. Cutting away the rock at the base I found at least a dozen instances of these somewhat cylindrical and flat-topped and flat-bottomed rocks sitting one on top of the other. The first picture shows a cavity from which I removed some of these rocks. I don't know if it helps, but there's a lot of iron in this area. Any ideas would be appreciated.
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Here's a new find from the I&M trip last weekend. The nodule was full of indeterminate plant fragments, and I almost tossed it until this one small bit (~1cm in length) caught my eye. Maybe a wing fragment or am I being hopeful? The texture is much different than what I've seen in plants, but that's a bit hard to capture in pictures. I can try to get better pictures tomorrow in the sun if needed. As usual, any thoughts are much appreciated.
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Greetings, I’ve recently gotten back into prospecting fossils and I’m looking for some suggestions on sites to visit in western Pennsylvania. I frequently visit Ambridge PA to find fern and Calamite fossils from the Mahoning fm and would like to find more. I also would like to find fossils of early Permian (tetrapods, plants, or invertebrates). I hear that Washington county (south of Pittsburgh) has some great spots and would like to know if it were true. I also would like to show some of my findings from Ambridge as well. Note: I’d like this to be suggested places not just western PA but West Virginia and eastern Ohio as well.
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Pennsylvanian (Llewellyn Formation, 308-300 MYA) plant fossils from coal mine tailings near Mt. Carmel, PA.
fossilcrazee posted a topic in Fossil Hunting Trips
This was, essentially, a quick scouting trip based on threads on the Forum. Don't know much about these fossils but wanted to confirm the location and density of Pennsylvanian (Llewellyn Formation, 308-300 MYA) plant fossils from coal mine tailings near Mt. Carmel, PA. (NOT St. Claire, which is closed to collectors). There were abundant specimens, many bearing evidence of pyrite replacement: orange stems and plant hash. There was also some evidence of pyrite replacement by pyrophyllite to yield silver-colored films. Against the black matrix, the silver-film plant fossils are beautiful and, in my view, warrant prolonged and determined searching on a return visit. Once upon a time I had a lovely plate from the St. Clair site .... but it is no longer in my possession. Perhaps, with enough effort, and a bit of luck I can find a suitable specimen to replace it - may not be the pretty ferns but a good specimen to illustrate the fossilization process would be most welcome. . Special thanks to @idiot for location advice.
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From the album: Prae's Collection (REMPC)
REMPC P0021 Fossil Fern Macroneuropteris macrophylla Carboniferous, Late Pennsylvanian Llewellyn Formation, Bear Valley Strip Mine Coal Township, PA, USA-
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