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Showing results for tags 'concretion'.
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Crystallized dinosaur eggs?
Crazyhen posted a topic in Is It Real? How to Recognize Fossil Fabrications
Any idea if these are dinosaur eggs or concretion. The inside is completely crystallized like quartz. It is from Ganzhou, Jiangxi of China.
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@ynot et al. How would you characterize this rock? It's about 2 lbs and has dimensions of 4-1/8" x 2-1/2" x 3". Heavy, but does not attract to magnet. I am calling it an "iron-rich concretion". From glacial deposits in Michigan. Thoughts?
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People may think I’m crazy, especially people from Texas, but I went out to the NSR area today. It was 28 degrees, but I dressed appropriately and was fine. However, I was sweating quite a bit from being bundled up so well. So my hair got all wet from sweat and then promptly froze in something like dreadlock form, but I kept going for another 1.5 hours. Anyway, while out I found these. I would just like an opinion if you think they could be bones or concretions or something else. They look concretions that formed around bone to me. I know you can’t really say it is bone for sure because you can’t see the texture, but I’d just like to hear some thought on it. The NSR and Ozan Formation is known for mosasaur remains frequently found there. I have found a vert there before, but nothing else. This is the first one I found. I was trying to clear away some of the shale when I thought to take an in situ shot. This one was maybe a foot away from the other. I did find what looked a bit like a white baculite right next to and under one of them that was about 10 inches long or more, but it looked a big deformed to be a baculite. It was long and slender, but it looked pinched thin on one side of the length. I found another long while baculite looking thing, but heard a wild pig fight break out just around the bend in the creek and I didn’t want them to come around the bend and have an encounter with them. They can be very aggressive and nasty. The shape sure looked like bone concretions to me and there were quite a few clustered together in a small area in the shale. I saw numerous other concretions, but nothing like this and nothing clustered in this pattern. It was pretty cold and it was almost time for me to head back before it got dark. Also, I got my gloves wet while trying to dig them out and at that point I was done. Being wet in below freezing weather can be disasterous. If you think they could be bone I would want to go back and look for any others that may be there. I did dig these 2 out of the shale, but I haven’t gotten home to clean them up yet. I will post more pics after I wash them up. Any thoughts would be appreciated.
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Hi, this is said to be a specimen of Nothosaurus from Madagascar. It is enclosed in a geode. Any idea what species is it? And if it is genuine?
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Last January I was givin a box of fossil lobster concretions. I told the guy to give me year and I would bring him back a prepped out lobster as long as i could keep the rest. Most of them made it to the trash can. Very hard to get a decent fossil lobster!!! This one is not the best, but far from the worst. This one was actually good enough to prep. here it is. I think he's gunna like it? RB
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Good morning, I was given this rock 15 years ago and I believe it is from East Texas, but that is just a guess. I have no other information. I think it is nifty, but no clue what it is. Sorry if the files are too large, I'm inept.
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I was looking over the Smithsonian collection of Mazon Creek ferns tonight (http://paleobiology.si.edu/mazoncreek/mazonGroups.html). It seems like most ferns are labeled as Pecopteris species, but that there are a number of very similar fern species. Is there a good reference that breaks down the different species and how to identify them? I have Richardson's guide, but that is just for the fauna. Thanks!
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Any ideas? It is made of a black non-magnetic iron mineral. I was thinking a cast of a septarian nodule........
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Hello, I found this at Kalavasos formations (late Miocene 5-10 million years) (even though not so known, pygmy elephants,hippos and other mammals were found at this area as well) I don't know what to make of it.. there is a couple of holes at its bottom side.. I am being tempted to crack it open, if it opens, but I don't know how. p.s. it is 30cm diameter, circular shaped with a max height of 12cm in the center. Thanks
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I went out to the North Sulfur River (NSR) again today. I have a few things I have questions about. I think this is a concretion, but I've never seen one quite like this before and I've certainly never seen one remotely like it in the NSR. All the Red Zone stuff is pretty solid and monochromatic for the most part. This little piece is kind of pretty and cute.
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Busted open a softball sized concretion from the Nehalem River in Vernonia, Oregon. Looks to me like some kind of crustacean. Does anybody know what this is?
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Ok, I went ahead and spent $760 for two rocks. One is very large and weighs in at 42 Lbs and the much smaller one is about 3 Lbs. Once I receive these, (about 2 weeks), I will post in the prepping part of this forum. Im a bit scared though. There is going to be more rock to remove than I have EVER removed and ive been doing this for 26 years! But if you dont gamble sometimes one can miss out on a great oppertunity! My fingers are crossed. I am super nervouse! Well, and quite excited too! RB
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Hello all and thanks for all of your support on another ID that I asked for. I am very new to this so I read this site a lot before I ask any questions to learn as much as possible about my area of hunting. However, I do find things that are beyond my paygrade that I hope you can help with. The pics I uploaded are of what I am digging around. We had a big rain last week that washed off the big slab that I hunt beside. It is about 30 yards wide and about 100 yards long or so. The creek runs along the side of it and is a mostly sand bottom but sifting the sand is where I find coral, shark teeth and bone. Walking in I walk on the slab and I noticed about 8 randomly circles that were raised about an inch above the surface of the slab. They are the size of manhole covers pic 1. i followed them until I found one that had something I thought was a big oyster sticking out of it in pic 2. It has drilling type marks on the perimeter of the hole and the object stuck out about 3-4". I dug it out and it was what I have in pic 3. My searching has brought the answer to be between a concretion or an egg of some sort. The dimensions are about 13" from top to bottom and a circumference of 28" or so. It weighs around 30lbs. Any help would be appreciated.
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I'm at a loss here. This is perhaps the most unusual of the Mazon fossils that I have come across, and I don't recall seeing anything quite like it in the photographs posted here, but I could have missed something. This is from an old collection of Mazon pieces, and, for an unknown reason, is one of the few that has a lacquered or sealed surface. The concretion, as an intact nodule, measures 2-3/4" x 2-1/2", and the fossil inside is roughly 2-1/2" in length. Any ideas? ~Paul
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Hi, found this concretion on Yorkshire coast, looks like can see head with pinchers with various other body parts, what do you guys think ? Thanks.
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The collecting of Mazon Creek concretions in my opinion is one of the most disappointing ways to spend time collecting fossils. Now don't get me wrong, I have been collecting them for over 30 years and I have literally thousands of unopened concretions that will take me years to open. A number of years ago I made the decision to only collect and not open any in the field. There use to be so many, that I and others would open them with hammers at Pit 11, Pit 4 and various shaft mines. But many time nothing of interest or worth keeping were found, so I would have a 2 hour trip back to Chicago with nothing but a sunburn and a couple ticks to show for my trip. So I started to just collect because that way there was always a chance that I would have something special in my bucket(s).- and I have found a great amount of "special" things. There was also another reason, Illinois does not promote this vast area of fossils and due to the re-seeding and planting of the strip mines, vegetation has come back with a vengeance and the concretions, for the most part do not weather out like they use to. They are trapped again, like they have been for the last 300 MY and I knew finding them would become more difficult. So now on with my plight- after 300 MY in the ground and a few years at my house, I freeze / thaw them for weeks to months at a time and after all that, most of the time I end up with nothing or something that I don't need (see pics below of a great looking concretion that opened and had nothing for me). It was very enjoyable this summer collecting at St. Leon for hash plates, etc., the Peace River for shark teeth and in Murray Co Georgia for trilobites- it felt good that everything that I collected was an actual fossil. Now back to my freezer.
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Hi! I found what may be a large -4-ish concretion at a creek in Crawford County, In. It is different than what I have encountered before. Any thoughts on prep or whether it is worth digging into?
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Hi folks. Several years ago while digging shale with an excavator for road repair, we hit what appears (now, with forum learning) to be a concretion, typical oval/oblong shape about 5' long. We had to dig around it as it was too hard to even scratch with the machine. Over the years it has degraded to where it is quite fractured from the weathering and is easily broken up. The pic is a portion of a "ball" of densely packed fossils that was near the center of the concretion. Could this cluster have been the nucleus ?, or could it have just gotten caught up in the formation ? This is about 3 miles from my digs at home and is a much harder, blue/black shale that was at a depth of about 8'. Nice and clean ... no scrubbing necessary. Thanks
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Ive only got an hour or two to play on the FF. Im leaving on a fossil hunting trip tomorrow morning at about 4 am. If I can find what im after, it will be a rare fossil. Just hoping I can get a really good one. Been looking for one of these for years!!! Dont meant to be so mysterious, but im not sure if i will get any? My question is for @Fossildude19. if I find some of these concretions, it will be found this month and close to the end of the month. i wont be able to prep any till next month. My question is: Will I still be able to post it in the 'Fossil of the Month'? I dont think Ive ever posted in Fossil of the Month, but would like to with one of these? RB
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Newbie to Mazon Creek fossils. I couldn't find anything like this while searching online. Any help would be much appreciated.
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Hi there, I'm part of a rock panting group and I found this rock up in the PNW and the first thing I thought was cool I want to paint something hatching out of it! But I thought I'd make sure it isn't something special before I paint all over it. Hoping someone here might know, fossil, geode, concretion? Thank you!
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Hi all, Originally I thought this was an iron concretion, I still believe it is but was wondering is there is any geologist in the group (or expert) who can point out a more specific type of mineral (siderite? hematite?). Never seen a concretion like this and it was intermingled with Shale packed with plant material and root casts. I want to know if there is any correlation to this mineral and abundance of fossils in the deposits I'm frequenting. Found in Triassic deposit Deep River Formation, NC (Newark Super Group). Regards to all, Alex
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I don't know what to make of this rock that was found near San Angelo TX.
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