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Showing results for tags 'chert'.
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Found this in the ‘Golden Gravel’ in our garden. Source unknown as it was here when we moved in and rock ID’d (using an app) as Yellow Jasper. The closest thing I’ve been able to find for the fossil is Hamulina or Toxoceras (last image), but not been able to find any mention of this being found in Jasper. Any ideas?
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- hamulina
- golden flint
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Hi! Is this a stromatolite? I picked up this rock on the premises of the Teleajen oil refinery in Prahova county, Romania. I have seen a chert wedge in a limestone boulder once upon a time, but this stone is different. It has layers of chert and carbonate, right? I grinded and polished the stone. Here is a close-up from the carbonatic area (fizzles with acid): Any idea how old are these rocks when found in S-E Europe? Thanks!
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An acquaintance found this on a ranch outside of Roscoe, TX. I presume it's some sort of fern. Any chance we could narrow it down further? It's a lovely specimen with a special remembrance for the collector. Appreciate any help you can offer.
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Hi everybody, I'm a neophyte to the geological realm (especially regarding paleontology), but I thought I'd share some finds on the forum. In Layman's terms, I found some clams, possibly some coral, and (...wait I know this one) Crinoids! Any possible fossil ID would be great, happy to be here, and glad to join a community with similar interests! All items below were found within 100-200 yards of each-other on the Meramec river just outside of St. Louis, Missouri. 1) 2) 3) 4)
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- missouri
- historical
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From the album: Missouri Bryozoans
One of my favorite finds due to how its almost complete and is in a very hardy rock I am assuming to be chert-
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- fenestrate
- bryozoan
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These come from limestone quarries in central Iowa, near Springville, which appear as crushed gravel for roadbeds. My sister picks these up on her walks and wonders if these are the result of volcanism, or fossils, or what? My friend and fellow fieldtripper Kent Budge gives the following explanation, but suggested that we post here to get the insights of real experts. “These are chert nodules that are formed by microscopic plankton called radiolarians, which are little microorganisms that pull silica out of sea water to make their shells, less than 1/16”. They can pull a lot of silica
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- fossils?
- iowa rocks
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I found this in a creek in middle Tennessee. Is this part of a bone or is it chert? Or maybe it's something else completely. i see a circle on the inside of the tubular shape. there is also a less worn area that makes me think it is fossilized bone. I'm posting pictures with and without a louper. We have ordovician fossils as well as some ice age mammals. One dinosaur was found here, the hadrosaur. Birds, crocodiles, trees, i don't know about whales.
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Went out to a railcut that slices through upper Racine formation. This locality is only 10 minutes from my house. I almost never visit it because of scarcity of fossils, however I was reading a paper that mentioned forams in chert and decided to take another look. Here you can see the beds dipping gently to the east. This is interreef strata. Closeby is/was a huge reef, now filled with garbage. Here is a chert nodule to be sliced up. Also, found a silicified coral and packed in my bag. Disturbed this guys slumber. Silicified Favosites
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- silurian
- foraminifera
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Strange shaped Chert nodule? Or native artifact? Natural or not? Found in creek.
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Had this in with my rocks for tumbling, now that I'm looking at it again I'm thinking it may be something. It came from Alluvial gravels in creek where I've found other artifacts. Trying to learn to recognize when something has been worked, think this has, and the edge is quite sharp.
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Found this guy today. Anyone know what it is. Found 25 miles northeast of Nashville. In chert with corral horns and crinoids.
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Hello, everyone, these fossils were collected from the basal Cambrian in South China, all of which are organic. But I do not know what are they? Does anyone can identify them. Please see the attachments! Many thanks.
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I found this on one of our mts in middle Tennessee. I'm concerned it may be bone and not chert like I had found later near my home.
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I really almost dismissed it as a rock but second guessing. Could this be a shark tooth possibly? It was found along with crinoids and horn corals in a creek in Nashville area Tennessee
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What causes certain pieces of chert to have a plastic look and texture after an acid test
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On this piece of chert it appears to have either an iron or copper coloring at the top but a green undertone at the bottom. On the second picture I’m assuming that was caused by erosion. What would create the green undertone coloring?
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does anyone see anything that resembles any kind of dermis of any kind in these photos
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Like in the title, I am unsure if this is even a fossil.
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Found this at the edge of a shallow stream bed that flies down from Smoky Mountain region in East Tennessee at Indian Boundary Lake near Tellico Plains Tennessee at edge if Cherokee National Forest. It measures 2" long, 1.75" at widest 1/2" deep at deepest. A bit more flat on one side. Cross section shows a thin outer layer. Outside look reminds me of wood but I don't know. Looks like photos too big so I will load another below.
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Fossils from the Baksteenkalk, Netherlands (includes trilobites)
Oxytropidoceras posted a topic in Documents
van Keulen, P. and Rhebergen, F., 2017. Typology and fossil assemblage of Sandbian (Ordovician) 'baksteenkalk': an erratic silicified limestone of Baltic origin from the northeastern Netherlands and adjacent areas of Germany. Estonian Journal of Earth Sciences, 66(4), pp.198-220. Link to open access PDF file Winterman, W., 1990. Baksteenkalk. Grondboor & Hamer, 44(1), pp.11-13. Rhebergen, F., 2001. Trilobieten in noordelijke zwerfstenen in Nederland. GEA, 34(3), pp.39-43. Rhebergen, F., 1993. Ordovicische zwerfstenen i-
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- ordovician
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All of my pieces come from a creek on Crowley’s Ridge in northeast Arkansas near the Missouri border. Crowley’s Ridge is believed to be about 10,000 years old. Located as far north as New Madrid, Missouri and as far south as Wynne, Arkansas, it is believed by some to be a former bank of the Mississippi River. At some point, it may have even been an island. Some research has suggested that the ridge was affected by volcanic activity in the distant past. Today, Crowley’s Ridge is known for its gravel pits, uplifts, and bluffs which were likely caused by t
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Hi, I came across this rock on the beach in Eastern Canada. I was wondering if anyone else finds it interesting. The marks on it resemble bite marks and I cannot let it go until someone helps me figure out what it is. Thanks! It's approximately 12 cm long.
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Hi everyone. I found this piece of Missouri chert in a creek bed, but I am not sure if it is coral or just erosion. I have seen other pictures of coral that look similar to this, but I do not see any biological pattern or clues that this was once alive like you can see in something like a crinoid. Any help or tips would be appreciated
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My husband is an irrigator in the Midland, TX area. A client of his had this in their backyard and gave it to my husband. It was found on the clients ranch originally near Fort Stockton, TX. We thought it was a bone because, well, just look at it lol. We were able to take it to a gem and mineral show yesterday to have it looked at and the concenous was although very interesting, it was chert. Now all the research I've been doing on chert and I have yet to find anything like this. Reverse fossil maybe?
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I've had this ax for several years. It comes from Denmark, or at least that area. Made of ground stone, it contains a fossil that is approximately 5mm long. I have wondered since I got this what that fossil could be. Any help is appreciated. The ax: The fossil:
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