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Showing results for tags 'Mississippian'.
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Strikingly preserved in an iron-rich hump on a grey limestone, one of the commonest Mississippian corals in the British Isles, France, Belgium, Germany and Russia. Not known from Asia, Africa, Australia or the Americas. Frequently found as an erratic on many parts of the British Isles coast. The simplest and narrowest Siphonodendron species (typically 2.5 - 3.8mm), easy to identify as it has no dissepiments. Central columella present in most corallites, with dome shaped or conical tabulae. Usually sixteen major septa. (14-18 possible) Minor septa may be present. The calcite filling in the voids is transparent and the specimen is varyingly coloured with presumed haematite, highlighting the structure visible below the surface.
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I have three fossils I collected last week in Kentucky during a family visit. The first I know is a partial crinoid head, missing most of the calyx, but what genus/species? It was found near Leitchfield, KY in the Leitchfield Limestone, the Jimmy Dean member. The second, I don't know what it is. It was found in a layer that was rich in crinoid stem pieces. The locality is just north of Elizabethtown , KY. I don't know the formation, but it is certainly Mississippian. The last object I'm not sure is even a fossil though the thing on the bottom is a crinoid stem piece. I don't know if it is attached to the object in question. It was found at the same locality as the second fossil. I would like to thank TFF member Herb for leading me to these two localities. I welcome and all input. Thank you.
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Arizona, redwall limestone, Mooney member, Mississippian. I've found several of these and I'm just not sure what's going on here. Looks like fossilized worms eating away at the brachiopod but now I'm thinking the tubular structures are fossilized guts. Any thoughts or other possibilities would be appreciated, thank you.
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From the album: Collection
© fruitoftheZOOM
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A friend of mine found these fossil impressions while digging the foundation of his house near Huntsville, AL. This is Mississippian, Bangor Limestone Formation. In trying to identify the species, he thought it might be megistocrinus sp. He would like a definitive ID, if possible, so I appreciate all help. Thank you, Leah
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NW Arizona, Mississippian, redwall limestone, Mooney member. I need your help determining what if any, of these examples are Stromatolites. From what I've read they should be all around me but nothing on my property seems to match pictures online. I numbered the three smaller rocks and the fourth was much larger and outside. Are any of these layered rocks Stromatolites? Thank you and sorry about the sideways view, top and bottom cut off when it was rotated.
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There isn't much showing, but what is seems similar to my other trilobite found in same area. Any thoughts? Second picture includes previous more complete find as comparison
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I recently made my way down to my local creek in a suburb oh Chattanooga, TN. I've always thought I was hunting in Ordovician limestone, but now I'm pretty convinced I'm hunting in early Mississippian chert due to a few species I've found at this location. I didn't take pictures of what I consider my more "rare" finds but once I get a chance to I'll post them on this thread. I mainly find crinoid stems at this location, but I sometimes find rugosa corals, which are more uncommon.
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I'm not sure what this is, haven't seen it before. This was a few feet from where I found a trilobite last week and was looking for more when I turned this over. Any ideas? @Arizona Chris
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Near grand canyon caverns, Arizona. I just found this, looks to me to be a gastropod fossil, or possibly two?
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NW Arizona, walking the dog last week, stopped so he could water a tree, I looked down and found this. I thought it was the back half of a trilobite, but I've been wrong about everything else so it's very possible this is actually the head of a flying mud snail that infested the entire continent last year. Any thoughts? Thank you in advance
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NW Arizona, near grand canyon caverns. I found this today, i brought it home because it looks almost like it's been cut on a bandsaw. It looks like a bone that's been cut and fossilized. Is this just a rock or something else?
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I recently chiseled this piece out of a Mississippian road cut exposure in north Tn, Fort Payne Formation, with a generous assist from TFF member @Herb. I apologize for lack of proper scale, measuring approximately 6cm x 7cm x 5cm x 10cm. I used a dremel, soaking, and scrapping method to remove as much of the hard limestone, but cannot remove the rest as the dremel bounces off the solid crinoid hash remaining. I am having difficulty with identifying where this would fit on the crinoid unless it is something similar to the proximal stem and branching arms shown on the illustrated figure by Ausich, W., Brett, C., Hess, H., & Simms, M. (1999). Crinoid form and function. Fossil Crinoids. http://paleoinver.materias.gl.fcen.uba.ar/index.php/download_file/view/106/129/ I appreciate the help! Thank you, Leah Bottom Front (for reference) Side Top
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From the album: Mississippian Redwall Limestone Fossils, Arizona
Large one inch sized Orophocrinus Saltensis Blastoid top half. You can just make out the ambulacral feeding grooves inside its five fold symmetrical body.-
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From the album: Mississippian Redwall Limestone Fossils, Arizona
5x close up of the ambulacral feeding grooves. The ribs have tiny cross ribbing used to channel the flow of food to the animals mouth in the center, where the five point star is located. -
Here's a crinoid I found the other day in the Menard Limestone (Chesterian series). I'm not so sure of what genus it may belong to.
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Syringopora sp. from the Redwall Limestone
Arizona Chris posted a gallery image in Member Collections
From the album: Mississippian Redwall Limestone Fossils, Arizona
Here is a nice cross cut example of Syringopora, the most common coral you will find in the Redwall Limestone, Mooney Falls member - On the Mogollon Rim north of Payson. This is a pink chert mold, and the orginal coral has dissolved away leaving very fine details in the chert. This is a fine example of a Tabulate coral, the animal resided in the tops of each tube in a calice, and filtered food out of the plankton. -
I found this a while ago (back in February I think) and I initially identified it as a pill millipede. Well, I got back around to examining it and after some research online I'm no longer confident with that ID. It turns out that pill millipedes didn't exist as far back as the Mississippian, and even though millipede fossils are known from the area's Devonian rocks (like at Red Hill), none of their finds are similar to mine. I understand that time difference may play a role, but still they should look generally the same. This specimen is more rounded and "squat" then the Red Hill examples and other fossil millipede specimens, and has more robust tergites (segments) on its body. I still believe it is most likely an arthropod for a few reasons, one is that I still have yet to find any plant material from this layer, two because these rocks are early Mississippian in age an no plants that would look similar exist from this period in this region, and three is because the segments on it's body are too different from the growth lines of plants and appear to be part of an armored exoskeleton rather then the result of growth as in plants. Beyond this I have no real idea anymore. I have found a trigonotarbid before in this layer of shale, but even that specimen is not quite the same as this one. I'll try and get better pictures later today, right now all I have is this. If you look carefully enough, there appear to be faint impressions of some legs to it's one side.
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Phillipsia peroccidens - Second cranidium / glabella
Arizona Chris posted a gallery image in Member Collections
From the album: Mississippian Redwall Limestone Fossils, Arizona
Another close up showing the tubercles at a better advantage. -
Phillipsia peroccidens cranidium / glabella
Arizona Chris posted a gallery image in Member Collections
From the album: Mississippian Redwall Limestone Fossils, Arizona
Here you can see the both the upper and lower surfaces of this rare trilobites cranidium. There is much debate as to what the actual tubercles were used for - sensory, camouflage, or defense. This pair of fossils were found on the Mogollon Rim in northern Arizona near the town of Young. Arizona Chris -
I've finally got around to compiling some photos of my tetrapod footprints from a road cut here in Maryland. All of these finds come from the early Mississippian aged Purslane Formation, which belongs to the Pocono Group and thus are about 350 million years old. In Maryland the Purslane represents the late Tournaisian through the Visean stages of the Mississippian. These finds are particularly interesting because they come from an era known as Romer's Gap, which was a span of time from the end of the Devonian to the end of the Mississippian where worldwide fossils of tetrapods are rare, and known mostly from a just a few sites in the entire world. As far as I know no tetrapods have been recorded in rocks older than the Mauch Chunk Formation, which is the unit that overlies the Purslane in Maryland (in WV there is the added Hedges Shale above the Purslane, but this unit is absent in Maryland) so definitely some cool finds! I've found what looks to be around two or three different kinds of tracks, some having rounded toes and others having pointer ones. I don't think they're new species, but rather new occurrences of younger species represented in the Mauch Chunk. Most of these footprints are hard to see without a certain angle of light, which unfortunately would obscure most of them in shadows. As such, I've resorted to outlining the shape of the prints in red. Thanks to mstimson for giving me helpful information about them!
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A rare genus from this bed, one previous record seen from Cumbria. It is common earlier in the Mississippian of the region. The voids are filled with transparent calcite. This genus has a lonsdaleoid outer dissepimentarium (looking like large bubbles). As is most commonly the case, it was largely removed prior to fossilisation, leaving a trace on one side (see photo 4). The contorted axial region is typical.
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One of the commonest Mississippian corals in the British Isles, France, Belgium, Germany and Russia. Not known from Asia, Africa, Australia or the Americas. Frequently found as an erratic on many parts of the British Isles coast. The simplest and narrowest Siphonodendron species (2.5 - 3.8mm), easy to identify as it has no dissepiments. Central columella present in most corallites, with dome shaped or conical tabulae. Usually sixteen major septa. (14-18 possible) Minor septa may be present. This specimen shows all these features very clearly, partly because the voids have been filled with transparent calcite.
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I'm sorry if this is the wrong sub for this, but I wanted to show some of my finds. I went out to go collecting at an exposure I had passed many times while driving to other fossil sites but never visited before. When I went to the road cut back in September and November it wasn't too badly overgrown, but was separated into two parts by trees and talus cover. The southernmost part was mostly sandstone and siltstone from the layers lying above the coal-shale beds that were exposed further north on the road. For the most part the fossils from these layers were poorly preserved plants, though I did find a rare trigonotarbid from closer to the contact between this layer and the coal-shale one. Further north on the road from this part of the cut was the more interesting coal-shale layers, which housed many more floras, amounting to about six different species. These layers were characterized by a diverse array of plant life. Specimens from top to bottom: Hash of assorted fragments from Triphyllopteris lescuriana (?) from the sandstone beds above the coal. For the most part these rocks were not fossiliferous, but they do occasionally have large hash slabs such as these two specimens. Abdomen of the as yet unidentified trigonotarbid, possibly the first one recorded from this formation from the state of Maryland and the first one since the original found in 1930. It was interesting to find the ancient relative of the animals that infested some parts of the exposure (luckily I had a hammer to swipe all the wolf spiders away!) Rhodea vespertina.
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Hello, I am a middle school teacher and have been collecting fossils and minerals for a number of years. Most of my collection is primarily Pennsylvanian and Mississippian fossils collected within a few hours of B'ham. I am eager to learn from this group in order to identify and catalog my specimens more accurately and also expand my collecting areas with groups outside central AL. I appreciate your patience in advance for some of the specimens I have questions about since I have not developed a great skill in prepping my finds as yet. Thank you for allowing me the opportunity to be part of this community.
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