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Showing results for tags 'sandstone'.
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Red Flag on "Medusoid" fossils from the Ediacaran of Namibia
connorp posted a topic in Is It Real? How to Recognize Fossil Fabrications
For those interested in Ediacaran fossils, you may have seen a lot of supposed medusoids coming out of sandstones/quartzites in Namibia. They are usually labeled as unidentified medusoids, but sometimes as the enigmatic genus Namacalathus to command a higher price. At first glance, some specimens do bear resemblance to a top-down cross section of Namacalathus (such as the specimen below), however note that Namacalathus are preserved as calcite skeletons, not as molds in sandstone. A thread discussing these was posted several years ago, without a definitive conclusion. As far as I can find, there have been no published articles on these so called fossils, and perhaps rightly so. After a recent trip to the Field Museum, I am fairly confident that all of these specimens are simply the result of weathering in sandstone. Here is the specimen at the Field Museum that piqued my interest. A quick scan of our favorite auction site will reveal a number of nearly identical specimens listed as medusoid fossils. These holes are likely what are known as tafoni, defined by Wikipedia as "small (less than 1 cm (0.39 in)) to large (greater than 1 meter (3.3 ft)) cave-like features that develop in either natural or manmade, vertical to steeply sloping, exposures of granular rock (i.e., granite, sandstone) with smooth concave walls, and often round rims and openings." They have various methods of formation, but the more "Namacalathus"-looking specimens look (at least to me) to be the result of iron nodules rusting out. They may also be several tafoni that overlapped. Here is an image of tafoni in sandstone from Namibia. (image credit Wikipedia) Regardless of the exact process of formation, I am confident in saying that these are not fossils. There are plenty of other Ediacaran fossils out there for purchase, and given the high price tag these pseudofossils seem to command, I hope this post helps collectors avoid wasting money.
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from Brazos River west of Houston Texas in a sandstone cast? I am not holding my breath on this one could this be a partial track?
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I found this fossil a few weeks ago. It was in a creek bed that flows during the wet season but has pools in the dry. I know the creek has sandstone, but it also looks like it has limestone and possibly slate. There is also a lot of rocks containing rust. This fossil appears to be stained with it. I am located in Western Kentucky near Hopkinsville. One side looks like it is ribs. The other side is smooth and one part is unusually round. There are pockets that appear to be filled with sediment that has solidified into rock. I've added pictures from all sides and others with measurements. I will add them as replies since the files are too large. I wish I had more, but this is all I have.
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Cheboygan Michigan they look like brains, I find them from baseball to basketball sizes. I broke one up with a sledge hammer, the center gets more dense. The out side seems to house shells?
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Hello: I found at an East Texas construction site. It appears to be in sandstone. i can see a rib cage and forearm. Any comments are appreciated.
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I found what appears to be a small sandstone on a Tampa Bay beach in Florida. It's about 1 inch by 1 1/4 inch. After looking at it under magnification I saw unusual vein-like strands on these raised tanner bumps on both sides. What is it? Is it a fossil? Thanks Guys! Front view angles
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Dear Guys, I recently found three very interesting remains- two inarticulate brachiopods and shark like scale in sandstone erratic. Judging by brachiopod fossils I think they belong to paterinids and then this erratic is probably Cambrian in age! One inarticulate brachiopod is 6 mm and another is 3 mm diameter. Shark like scale (maybe the oldest in the world) is 2 mm length and has fragment of root in one side visible. Please help to identify these brachiopods to know the exact age. Any help will be very appreciated! Best Regards Domas
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While out before a snowstorm hit the area I was in search of fossils in different areas back in a deep canyon. I found this on a slope for an area known for Silurian/Devonian formations. The Devonian (Sly Gap) is known for sandstone which this specimen is in. Above that it is Mississippian with no such sandstone that I am aware of. I'm gathering some samples to begin learning fossil prep. As this is sandstone, I recall from college using DMSO to loosen sandstone matrix...so it was going to be a sandstone experiment versus the limestone specimens I've got lined up for when my vibro engraver shows up. Anyway, enough babble....any ideas? Length is 2" on the dot.
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Found this in the lake macquarie area. I know its a long shot but is this a fossil or just a concretion or something else geological? P.s. just ask for more pics. I can only upload one due to limitations.
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Any help that anyone can give me would be absolutely fabulous I'm a mature student trying to write her dissertation and I'm a bit lost Although I don't think it's essential to know what the fossils I find are, I think it would be nice to have a name , but not even the mighty Google has been much help! I also have a few more samples I may post later, if its not too much trouble cheers, Nicky
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I think this is sandstone but what are the little things covering it?
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Teeth and vertebrae from the Atlas Mountains bany help with identifying would be appreciated (:
Notidanodon posted a topic in Fossil ID
Sorry this is my first time in Morocco and I’ve never fossil hunted abroad if possible could any1 tell me what the teeth are (apart from the mosasaur one) and if the 2nd photo is a fossil or not
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this is 1/2" across, the opening is 3/8" sandstone matrix, calcite thingamacallit found in Meade Co, KY about 300 feet above the Ohio River. Thanks for help
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I found this partially buried in a wash run off area of Zion National area. I’m wondering, because of the rings it might be petrified wood?
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Hello, I found the stone in the attached image among loose rocks on the ground on a ranch near the Chisos and Christmas Mountains between Study Butte and Terlingua, Texas near Big Bend National Park. When I found it, about 3/4 of the darker area, which appears to be some type of fossil, was exposed, which gave it the appearance of a small worm. But as a scraped it with a flat-head screwdriver, it turned out to be a closed structure with a depressed region in the center. I thought it might be a trilobite due to the shape, but having seen the trilobite fossils on this site and others, it doesn’t really look like one. The only other thing I can compare it to is a molar (tooth) about twice the length of a human’s, but smaller than s horse’s. The rock seems to be some kind of sandstone or limestone, which is consistent with formations in that area. The darker area is significantly harder than the surrounding rock. I have removed around 1/16” around and above the darker area, but figured I would consult the experts before continuing, as I’m not sure if it’s anything of interest and don’t want to waste time if it’s not, and if it is, I don’t want to damage it, as I would imagine that attacking it with a screwdriver isn’t the proper method of extraction. Any ideas and/or suggestions are greatly appreciated!
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This forum did so well last year on the Stigmaria fossil I had, I thought it was worth trying another one. This is both sides of a fish in sandstone. The origin is unknown, but I think it comes from the same formation where many fish fossils in sandstone come from (the little plates that are available at any fossil dealer). To me, because of the scales and the shape of the head, it looks like a modern Gar. The head (best seen on the bottom of the right side) looks like it may have an armored plate on the forehead. Any ideas?
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Hello, I am brand new to the forum - I hunt for fossils often, but I am completely stumped here! I found this a few years ago in Slade, KY - inside of the Red River Gorge - in the Red River. I think it looks like a giant centipede, with some sort of antennae at the top, but one experienced fossil friend thinks it might be a cycad cross section. I see legs, a critter.. but he sees a plant. Hopefully one of you experts here can solve this mystery!
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These inclusions are in Broome WA Australia sandstone possibly just higher than the famous dino-foot prints. The shape, relative thickness of wall and lumen, the layout and spacing on the platform, and some of the detail on them, all remind me of sponges. Can anyone confirm. If so there is about an acre of them! The longer ones all lie prone or are aligned in the same direction. A fossil sponge garden or cruel geological hoax?
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Found this on a beach near Anglesea in Victoria wondering what it might be ?!
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Very new to fossil hunting. I was wondering if I would be likely to find any other kinds of fossils in a sandstone outcrop with lots of what looks like coal seams running through it - see picture.
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Can you help me identify this fossil? Late Miocene/Miocene, Phillipines, Camarines Norte
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Hi I’m a new member with little experience. Found this on a beach near Torquay in Victoria Australia. It had weathered out from a limestone/ sandstone cliff. Wondering if it is bone. Whale bones have been found in these cliffs in the past. Wondering what people think.
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