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Showing results for tags 'striations'.
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Hi all, Recently came back from a fossil hunting trip from a Miocene age deposit. Was looking through some of my finds and noticed that what I believe to be sand tiger (Carcharias taurus) teeth have striations on them. I am fairly new to shark teeth collecting and was wondering if only sand tiger's have them as I have not seen them on other genus. Wondering if anyone here that is more knowledgeable could shed light. Thanks in advance.
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Found in Jackson County Missouri (I didn't find it myself, but I can most likely get more info on location it was found.) I do believe it was found in a dirt road alley. Long dark grey and brown striations, that cannot be scratched with my nail. Then on one side in a few large chunks, an orange/brown (rust colored) residue, that can be scratched off. I thought my pictures were going to look much better than this. So I can get better pictures ASAP if need be. Let me know any other information I need to provide. Thank you for looking! Hope everyone is safe and healthy out there!
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I have been unsuccessful in getting information about this on the general internet (the All-Knowing Google failed me, AGAIN! ). How in the world can you tell if a rock that you have in hand is a stromatolite as opposed to just a rock with striations- like agate or something? Especially if the stromatolite has had a section cut and polished?
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Hi, I found this while looking through some North American cretaceous gravel along with a serrated rex tooth fragment. Does anyone think it's a pterosaur tooth or a mineral, apologies if the pictures aren't good thanks in advance.
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Posting for an acquaintance. Someone claims this is a mammoth tusk, and they're 100% certain. I'm not so sure. I've seen mammoth tusks in museums, and up close and personal digging one out of the dirt. I don't remember longitudinal striations like this object has. Can anyone tell me what it might really be? Or confirm if it's actually a segment of a mammoth tusk? Best pictures I've got, 3rd party source.
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Hello again, I found this rock 20+ years ago in Sept-Iles, QC, Canada on a business trip. I thought is was very cool but it has been sitting in a box until now. I read Sept-Iles is located in the Canadian Shield, a large area of exposed Precambrian igneous and high-grade metamorphic rocks (geological shield) that forms the ancient geological core of the North American continent. It is black and looks like it has been cut and polished and has striations. The polished face measures about 3 x 1/34 inches. What kind of rock is it? What made the striations, a glacier? All help is appreciated.
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The following set of photographs is of a roughly 5-inch x 5-inch x 7-inch limestone fossil. I found it in Eastern Anatolia along the Turkish-Iranian border near the village of Uzengili. It exhibits striations from what I call "top" to "bottom", although there are some (only 2 or 3) horizontal striations that seem to have a replacement material akin to quartz, in that it appears clear (but very thin). At first I thought this was a coral, but I am beginning to wonder if it is a Stromatoporoid Sponge... however, it could be something entirely different, and that I why I am presenting photos of it in this forum to see if anyone recognizes this morphology. The following photographs show the fossil in rotations of 90 degrees (which I have labelled North, East, South, and West for reference). I also have a "top" and a "bottom" view, although what I label as the "top" may actually be the "bottom" if it turns out to be a sponge and not a coral. Of note are some tiny features along the "bottom". These features may be part of the fossil, ore perhaps they are growths of some other material that has leached out of the soil and onto the fossil. These features seems quite well integrated with the rest of the limestone. What is curious is the fact that the "bottom" looks like it is a fracture, in that it is smooth with few features other than some parallel striations. To have these intricate features survive on a fracture plane seems odd to me and that I why I am suggesting that they may be leached material. I am an engineer and not a geologist or paleontologist, so some expert identification help would be appreciated.
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Found in creek in west central IN. The second picture near the 2.5 mark looks to be the 'stem' end as the lines radiate from it.
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