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Showing results for tags 'kasimovian'.
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From the album: Glenshaw Formation Fossils of Western Pennsylvania
Left: CG-0700; Right: CG-0500 Pine Creek Limestone Scale Bar = 1 cm.-
- poterioceras
- pine creek limestone
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I’ve been trying to ID this huge cephalopod I found from the Glenshaw Formation in Brooke County, West Virginia. So far, I’ve considered the following: Millkoninckioceras Kummel, 1963 Mahoningoceras Murphy, 1974 I was all in on the latter name until I noticed the sutures were fairly straight compared to the deep convex flank sutures. Whitney (1882) called the sutures deeply concave on the holotype of Mahoningoceras (original description in photos below). The umbilicus is open. The specimen appears to be flattened. I believe the ventrolateral shoulder is about the middle of the bottom whorl in the second photo with a scale. The largest coiled nautaloid I've found in this formation could fit within the center whorl of this specimen. It seems that the body chamber would add another 1/4 whorl length. With metric scale: Coated with paraloid:
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- cephalopod
- millkoninckioceras
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I've had this for quite some time, I thought it may have been a gastropod. But I'm now very convinced I have an ammonoid. They are very rare over my way, they didn't like coming into the geologically temporary shallow sea bays that formed. We have many Nautiloids, but not many Goniatitids. I've considered Pennoceras and Mangeroceras. The former is reported from rocks of similar age in Ohio, but the shell ornament has me considering the latter. The growth lines curve back towards the posterior at the dorsal-lateral shoulders. Anyone from the mid-continent (who are swimming in ammonoids at places) have a good ID for this one? Scale bar = 5 mm. Conemaugh Group Glenshaw Formation Brush Creek limestone
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- brush creek limestone
- goniatitida
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Hello all. I am posting a link to a calendar I created for 2023. It showcases twelve different late Paleozoic gastropods I have recovered over the past three years in Armstrong County, Pennsylvania. Eleven of them are from the Pine Creek limestone, and one other comes from the Brush Creek limestone. Each month features a different gastropod, photographed after coating it using ammonium chloride vapor, using an iPhone to capture photos through a microscope lens. The cover photo showcases all twelve, and the images for each month typically showcase an additional view at a much larger size. While this is a color print calendar, all the content throughout is black & white. If you enjoy natural color photos of fossils, you might skip this. I am selling this calendar without profit to me. I am still waiting to receive my copy, and I can follow up on print quality when I get mine. Lulu says this is 100 lb paper, but I'm still determining what to expect. Please PM me for purchase information.
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- conemaugh group
- kasimovian
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Whatever this fish tooth is, I've never found one before. I had a small sliver showing in a rock and spent over an hour slowly air scribing over it and getting it to this point. I'm hesitant to go much further, as I may break it. I considered Polyacrodus for the shape, but I see none with the pitted pattern that this has. Tired of trying to ID Pennsylvanian fish teeth yet, @connorp? Maybe this is another paver type teeth from a ray, etc. For scale, the length of the tooth in the first photo is 13 mm.
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- pennsylvanian
- glenshaw formation
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I’m thinking this is Stigmaria. Scale bar = 1 cm. Found in the shale below the Brush Creek limestone, a zone with many plants.
- 3 replies
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- pennsylvanian
- kasimovian
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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.
- 16 replies
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- carboniferous
- pennsylvanian
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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.
- 5 replies
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- carboniferous
- plants
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Went looking for ferns and plants today. Spent my lunch hour splitting shale nearby. This one caught my eye. The ghosted pattern around the stem is interesting. I feel like it’s part of it seeing how symmetrical it is. And ideas? Length of the stem part is 2 1/8” (Don’t have a metric ruler handy) To me, the bottom portion is the base, so the shape is confusing.
- 4 replies
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- conemaugh group
- shale
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From the album: Vertebrates
Schizolepis manzanitaensis GOTTFRIED, 1992 Carboniferous Late Pennsylvanian Early Kasimovian Atrasado Formation Kinney Brick Quarry New Mexico USA Length 7cm / 3" Precise age and biostratigraphic significance of the Kinney Brick Quarry Lagerstätte Pennsylvanian of New Mexico.pdf-
- kinney
- schizolepis
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