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Showing results for tags 'oolite'.
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Jurassic/Cretaceous fossils? (sponge/bryozoan/crinoid)
IsaacTheFossilMan posted a topic in Fossil ID
My better half has just rediscovered some of her old fossils from years ago - as such, she does not know the provenance, though based on the matrix and preservation, I believe them to be Cotswoldian in origin - Jurassic, Inferior/Greater Oolite. These two in particular absolutely had us stumped - This is number one - I originally thought disarticulated crinoid, but the 'branching' pattern in picture 2 threw me off a lot, going to bryozoans and all sorts, bouncing around til' I decided, maybe, not a fossil? But then again, it displays the glow from calcite: And, secondly: The gap between the layers suggests to me that something dissolved - a shell? Any input appreciated! Isaac -
I went to a locale in Kentucky I'd heard about and did some hunting for blastoids, which I had never looked for before. After about an hour I came away with a bunch of crinoid pieces, some brachiopods, some random bryozoan pieces, a few horn corals, what may be a gastropod, and a bunch of blastoids of at least two different species. On to the pictures. I also included some random odds-n-ends at the bottom. A pile of fossils. Some of the more interesting crinoids. The three on top have some pyrite encrustation. The four on the bottom are interesting because they broke pre-fossilization but are still associated, have bryozoan encrustation, or have hold-fast nubs on them. Close up of pyrite encrusted pieces. Horn corals. Brachiopods. Possible gastropod. Blastoids. Largest is just over 1cm. More blastoids. Largest is just over 2cm. And finally some odds-n-ends found while drilling along the Tennessee River. Everything is from about 80'-100' bgs. Two pieces of oolitic limestone. Weird ball of something. No clue what it is. Really should acid test it at least. (Shown next to one of the pieces of oolitic limestone.) A carapace. I'm not sure if this is old material or if it is recent remains of something living in the subsurface gravel layers. And lastly a chunk of fluoride from NW Ohio.
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Hello and Happy New Year from Miami! I found an interesting rock on the beach a little while back and I can't seem to determine what it is. Since it was found at Miami Beach, it should be Pleistocene Miami Limestone. The specimen is about 3 inches in length. It looks quite similar to an image I found online of a seal humerus: Thank you :)
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Hey! I'd like some help with some recurring Cotswold brachiopods. Great Oolite group; Middle Jurassic (Bajocian - Callovian). I've grouped them into 4 or 5 species / clades, based on their morphology. Species A - strongly ribbed, crystalline calcite. The specimen in my profile picture! (obviously not a good picture, included to show the great size range) A huge one! Predated upon: Species B: calcite, very spherical, non-ribbed but prominent growth lines Species C: almost completely spherical, unknown mineral, no ribs Species D: small, typically crushed, very flat, no ribs Species E: only a single valve found, very prominent growth lines. is either a bivalve, but it could be part of species B (more prep needed); the shape holds the exact same shape as the upper valve of the other species B items. That's all! @Tidgy's Dad, wanna have a crack? I know you've hunted here before!
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- brachiopods
- cotswold
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From the album: Middle Jurassic Ammonites from Southern Germany
13cm. Phragmocone herveyi zone macrocephalus oolite Wutach Formation Found near Blumberg-Hondingen-
- bajocian
- macrocephalites
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No idea about this one, is it the inside of a scallop-like shell or is it worm tubes or maybe coral? Found near Bath (I think, as it looks like it’s in limestone). Any ideas for me? This is the “inside” view, I’ll post some other views after, (pic files too big)
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- bivalve
- cretaceous
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Ooops, sorry, I meant to post my request for fossil ID in this forum but I’ve never been on a forum before and ended up posting it in the wrong one. Please can you have a look at my post in Member Introductions. Thanks everyone. Doh!
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- bivalve
- cretaceous
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Not a fossil (although in some contexts, a pseudofossil), but I cut and hand-polished a piece of oolitic limestone this evening. These are nice, big, ooids (pisoids in this case), and one can easily see the layering. I thought some might like to see the results (scale in mm).
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I found this 40 lb chunk of what looks to be oolitic chert with some agate tubes running through it in east-central Minnesota while out agate hunting. Maybe it's considered a cold water agate, but I'm not really sure what that truly means anyways. Either way, I was wondering if there is something more to this structure besides oolites. Maybe some kind of coral or other reef building organism? Any more information would be great. Thanks!
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Everyone kind of guessed this was true. http://www.telegraph.co.uk/science/2018/01/18/buckingham-palace-riddled-ancient-fossils-scientists-confirm/
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- australian
- australian national university.
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A couple of small pieces that I collected recently in what I believe to be the Pennsylvanian, Westerville Limestone of the Kansas City Missouri area. There are not a lot of fossils in the particular area i found these in but the ones that are there have a nice white color and all these little 'oolitic pearls' and as always, comments and opinions are more than welcome! There are some small gastropods in this area as well and I think it definatly warrants another once over! Maybe on the way home from work today Here is a couple of pics! Thanks! pic1 pic2 pic3 pic4