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Showing results for tags 'Devonian'.
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I found this in Black River, Alcona County Michigan and I’m not sure whether it’s a trilobite or some type of clam. The rock in the area is primarily Devonian.
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I was wondering what this might be. It's a soft, light weight piece from northcentral IN. I am posting three pics but can't fit them all into this post.
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I recently purchased some Mid Devonian silica shale pieces with trilo-bits from @connorp. And by recently I mean last month... last year..(January is always confusing that way). Just several small pieces with partial molts I'm using for practice prepping. So after picking at a few all year... one of them has gone from a practice piece to an almost show piece. 1st pic is the original sales pic with the piece circled. In it you can see part of the trilo-bit, but not really anything else. I got a nose w/ a partial eye (base only), bryozoa scattered about here & there, some tiny crinoid pieces and a thing I can't decide on. Pic labeled with a 1 is an overall shot, 2 is a close up of the nose, 3 is a bryozoa (I think) & 4 is the question one. The entire stone is 7.5 cm x 6.5 cm. Nose is 1 cm wide, the small bryozoa fan thingy is 0.5 cm wide & the question one is 2.5 cm long. I'm using a needle in a pin vise, fine scribe tip in another pin vise, dental picks & a stiff(ish) nylon brush with hydrogen peroxide, 3x led magnifying lamp & 10x loupe.
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I went back to my very productive Devonian Martin Formation and Mississippian Escabrosa Formation near Superior, Arizona to retrieve my large single crinoid head fossil. Amazing Arizona Adventure original post link After some acid prep four crinoids and one blastoid were clustered together. Currents probably sorted them by size and shape. Several more hours of acid prep made the remaining four best ones stand out. I had to carefully break away pieces of shell that adhered and covered the crinoids and blastoid. Careful monitoring of their progress prevented any of them falling off the matrix. The resulting piece is probably the finest crinoid and blastoid assemblage ever found in Arizona. Finding one crinoid or blastoid cast in Arizona is very hard let alone four or five together. The two largest crinoids in the center and left are likely Physetocrinus lobatus. The upper right is an Orophocrinus saltensis blastoid. The lower right is an unknown crinoid. (Any idea what it is?) The field of view is about 7.5 cm wide. Keep looking for updates as I prep and post more fossils. I found several loose crinoid heads.
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I found this large rock filled with trilobite pieces yesterday near Manlius in central NY. I believe this rock is middle Devonian in age but I’m unsure of the formation.
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Just wanted to share a nice detailed chunk of coral
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Photos were not taken by me so I cannot upload better ones. I was hoping someone could point me towards a species on this bug. Its 3 inches and 3/8th of an inch. Supposedly Devonian. Phacops?
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Is this sample from northcentral Indiana a stromatolite? Thanks in advance!
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Hi folks. Nothing spectacular, but wanted to share a first ... for me. Wet ground and high winds toppled many trees in my area last summer. I investigated an uprooted pine and noticed the shale was packed with fossils. I carried a couple of chunks home and cracked them open. The first one revealed something I haven't encountered before. A Dipleura Dekai and an Eldredge ops in the same chunk. I hope to do some more digging in the spring. Any corrections are welcomed. Thanks,
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Are these two samples (from northcentral IN) bryozoans? The first image is 18 cm x 12 cm; the second is egg-shaped, same dimensions but has a dome. Thanks!
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I had thought syringopora and organ pipe coral were synonymous. However, I just read otherwise. How do I tell the difference? See attached photo of a fossil that's about 1 in./2.5 cm. I presumed it to be organ pipe coral. Is it? Thx!
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I came home this afternoon in some ridiculously warm weather for January (50F, 10C) and happened to look at a rock I'd collected from the Widder formation about two or three years ago that I had sitting out weathering. It was one that @Kane had quarried from his Gonaitite perch out of the Widder formation and kicked down to me. I'd originally kept the rock because it had a bunch of Mucrospirifer thedfordensis in it and I wanted to see what else would erode out of it. When I turned the rock over I spotted a small round fossil that was brownish... a different color than most fossils. It was pyritized so I chipped it out of the rock and took a look at it. It was a Gonaitite and one that I had never seen before! Most Gonaitites that I have found at Arkona are from the Arkona formation and fall into the Tornoceras arkonense genus, but this one is different. Tornoceras arkonense above, mystery Gonaitite below. I used a new tool that I recently purchased, a home tattoo pen, to clean out one side of it. The pen is quite effective on softer shale or limestone as long as the fossil is much harder. In this case it was pyritized so I didn't have to worry about damaging the fossil. It turns out that this specimen has a smaller diameter phragmocone than Tornoceras arkonense as there are prominent ridges (rather than gaps as in T. arkonense) along the sutures. The suture pattern is plain with a sweeping parabola facing backwards, a straightish line across the keel and then another parabola. I've looked into the usual sources ("CHECK LIST OF FOSSIL INVERTEBRATES DESCRIBED FROM THE MIDDLE DEVONIAN ROCKS OF THE THEDFORD-ARKONA REGION OF SOUTHWESTERN ONTARIO", Stumm and Wright, Paleontology of New York, Hall) and don't see much that correlates to what I've found. Anyone have an idea? The fossil itself is 7/16" (11mm) at it's widest and 2/16" (4mm) thick. It comes from the Middle Devonian aged (Givetian stage) Widder formation at Hungry Hollow, Ontario, Canada. Thanks for looking!
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Together with the brittle star Furcaster decheni STUERTZ, 1886. Palaeoisopus was one of the largest predators of this fauna with a length of up to 25 cm and a maximum diameter of about 40 cm with spread legs. This is a (slightly disarticulated) juvenile specimen. Line drawing from Lehman 1959, p. 102: References: Walter Maximilian Lehmann (1959) Neue Entdeckungen an Palaeoisopus. Paläontologische Zeitschrift 33: 1/2, 96-108. doi:10.1007/BF02988981 Jan Bergström, Wilhelm Stürmer, Gerhard Winter (1980) Palaeoisopus, Palaeopantopus and Palaeothea, pycnogonid arthropods from the Lower Devonian Hunsrück Slate, West Germany. Paläontologische Zeitschrift 54: 11, 7-54. doi:10.1007/BF02985882
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About two weeks ago, we went to Beltzville State Park in Pennsylvania and found some great Devonian fossils, some of which have been identified with your help. On our way, though, we stopped at a Shell station for air in our tires. There was a small hill of dark grey colored rock (shale?) next to the air pump. My son and I had a quick look. We found what looks like a mussel (pictured here) and something else. I was wondering if it might be a trilobite. Any help is appreciated. I included the location and pic of the hill to help with identification. So, pictures appear like this: location, suspected mussel?, rock for example and then the fossil in question. The picture with the ruler shows the object (circled in succeeding photos). Sorry if this is confusing. Thanks. Lehighton, PA 18235
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Found this piece of sandstone in Sullivan Co., PA. It comes from either the Huntley Mtn. Fm. (Mississippian/Devonian) or the Burgoon Ss. (Mississippian). What could have made these concentric rings? They go through the rock perpendicular to bedding. It's odd that the center is mostly round but further out is more square. Could it be a tree fossil? That is the only thing I can think of.
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From the album: Trilobite Sketches and Drawings
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Hello everyone, I working in dimension stone field in Armenia. This fossils where found in a sample small stone block brought for cutting to the factory, then they were machined polished as standard marble or granite tile. The tile (second photo) is 400x800mm app.16x32 inch. Kindly help me to identify these guys. Thanks
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Went to a fossil garage sale, were the person was selling off his collection, this fall with low expectation. Found what turned out to be a very nice specimen of a Devonian Crinoid after prepping it out. My friend Tom W. tells me it is more than likely an Arthrocantha carpenteri. Wish I knew what quarry it came from, it wasn't labeled.
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Below is an example of a Box Crinoid I was lucky to find in 2017 with the Cedar Valley Rock and Mineral Society in 2017. This quarry can produce Devonian Phacops, Greenops, Crinoids and Fish parts, besides lots of brachiopods . Been going here and the Conklin quarries for close to a decade. Finally found a complete Crinoid. This one is a Camerate Crinoid, more common name Box Crinoid.
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Hi, I spent part of the evening cutting and hand-polishing one of the Devonian stromatoporoids I found this summer and thought I'd share the results. First, a complete specimen (top and bottom of mound): Here is a cut and hand-polished face (multiple grits of sandpaper followed by polish): Here is a view through the microscope. You can see the pillar structure in the layers:
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Shamlama resurrected some old images for discussion on spicules and hexactinellids. Here are a couple of photos that might be of interest from devonian sponge ( stromatoporoids) fossils found in Presque Isle County, Michigan and Alpena County, Michigan.
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I have been able to identify (with your help) a few of the fossils we found while hunting at Beltzville state park. This is something that may be something. I tried to get the six-sided pics as recommended. What might this be (if anything)? Beltzville State Park in Pennsylvania, USA. I believe these come the Upper Devonian Mahantango Formation. Thank you.
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This trilobite is labelled as Viaphacops from the Bois D'Arc Fm., Devonian, Oklahoma. Can anyone confirm and perhaps assign a specific epithet? Scale in mm.
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From other examples I have seen, I think these are bryozoans (sp?). Is that correct? The first example in question is the one exhibiting pencil-like structure in the center of the rock. In the second picture (of the same specimen), there seems to be a porous structure shown. The shadows may look like the mold is raised from the rock, but it is not. The fossil is an imprint (concave into the matrix). I think these are from the Upper Devonian Mahantango Formation. Thanks
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This was my first time at Beltzville State Park in Pennsylvania, USA. I believe these come the Upper Devonian Mahantango Formation. I saw similar examples in other posts as was hoping to confirm my guesses. Thanks 1. Horn coral? 2. Crinoid stem?- not sure if that’s something to the left of the stem. 3. Rugose coral?
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