agatex Posted February 26, 2019 Share Posted February 26, 2019 (edited) I really have no idea what this is. Maybe I am missing something obvious. Maybe a nautiloid fragment? It was found in a fossil-rich hard miocene(I think) sand/mud stone. In the that piece of rock were some poorly preserved bivalve and gastropods. Lastly, what would cause those interesting markings on it? The NZ $1 coin is has a diameter of 23mm Thanks! Edited February 26, 2019 by agatex clarification 1 Link to comment Share on other sites More sharing options...
Manticocerasman Posted February 26, 2019 Share Posted February 26, 2019 the markings are fossil worm tubes, the hexagonal marks are probably coral or perhaps bryozoans. and welcome to the forum 2 growing old is mandatory but growing up is optional. Link to comment Share on other sites More sharing options...
Ludwigia Posted February 26, 2019 Share Posted February 26, 2019 I concur with your assessment of this as a nautilus fragment. The holes are probably from small boring clams. 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Coco Posted February 26, 2019 Share Posted February 26, 2019 Hi, 1 hour ago, agatex said: The NZ $1 coin is has a diameter of 23mm If you are able to give us the size of the coin, why didn't give us the size of the fossil ? Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
Praefectus Posted February 26, 2019 Share Posted February 26, 2019 59 minutes ago, Coco said: Hi, If you are able to give us the size of the coin, why didn't give us the size of the fossil ? Coco He wanted to show off the elegant kiwi bird. Link to comment Share on other sites More sharing options...
abyssunder Posted February 26, 2019 Share Posted February 26, 2019 I see nice surface borings and bryozoans. These look like ctenostome bryozoans, similar to Pierrella larsoni. 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Rayminazzi Posted February 26, 2019 Share Posted February 26, 2019 (edited) 14 hours ago, Coco said: Hi, If you are able to give us the size of the coin, why didn't give us the size of the fossil ? Coco If you don't have a reliable ruler or measuring device to hand you can look up on the internet what size a coin is, it's a little harder to look up how big your fossil is, not saying this is what happened but a possible scenario. Edited February 26, 2019 by Rayminazzi Edited for clarification Link to comment Share on other sites More sharing options...
Coco Posted February 26, 2019 Share Posted February 26, 2019 I’m sorry, but I’m not gonna waste my time looking online for the size of an American coin or any other country! It’s not complicated to measure fossils instead of measuring the coin ! When we ask for identification, I find it normal to make it easier for the person who helps. Coco 1 ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
agatex Posted February 26, 2019 Author Share Posted February 26, 2019 Folks I apologize. I didn't mean to offend or waste anyone's time. Using a coin for scale made sense in my mind. Apart from my introduction post, this is my first post here and I did spend ages trying to take good photos. I will measure the fossil and post the dimensions here. 1 Link to comment Share on other sites More sharing options...
abyssunder Posted February 26, 2019 Share Posted February 26, 2019 I'm wondering, if the meandering surface traces can't be close to Scolicia igen? 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
westcoast Posted February 26, 2019 Share Posted February 26, 2019 I believe it is a modern encrusting creature, not a trace. 1 Link to comment Share on other sites More sharing options...
agatex Posted February 27, 2019 Author Share Posted February 27, 2019 Here are some of the photos with dimensions indicated. 3 Link to comment Share on other sites More sharing options...
agatex Posted February 27, 2019 Author Share Posted February 27, 2019 (edited) 15 hours ago, abyssunder said: I see nice surface borings and bryozoans. These look like ctenostome bryozoans, similar to Pierrella larsoni. Here are is close up. Those traces appear 3D. Here is the ~10mb full resolution file if you care to take a closer look: Edited February 27, 2019 by agatex fixed link Link to comment Share on other sites More sharing options...
agatex Posted February 27, 2019 Author Share Posted February 27, 2019 (edited) Here is one more photo showing the dimensions. It's hard to show a 3D object. There are two of these bifurcated shapes in the matrix going in different directions. I have tried to show them by tracing over them. Edit: this angle shows the two structures better, one above the other Edited February 27, 2019 by agatex Link to comment Share on other sites More sharing options...
ynot Posted February 27, 2019 Share Posted February 27, 2019 1 hour ago, agatex said: Here are some of the photos with dimensions indicated. I think this picture shows an oxidation layer (brown) that has formed in fractures and weathered exterior surfaces. Some may be from steinkerns, but there is evidence of fracture in this picture Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
agatex Posted February 27, 2019 Author Share Posted February 27, 2019 (edited) 3 minutes ago, ynot said: I think this picture shows an oxidation layer (brown) that has formed in fractures and weathered exterior surfaces. Some may be from steinkerns, but there is evidence of fracture in this picture The only thing that makes me think it isn't a fracture is that there are two structures with the same shape pointing in different directions. But I am a newbie so I don't even know what I don't know While weathered and exposed to water, these structures were enclosed inside rock. I didn't find these structures until I got and could see some of those markings through a hole in the rock. Edited February 27, 2019 by agatex Link to comment Share on other sites More sharing options...
FossilDAWG Posted February 27, 2019 Share Posted February 27, 2019 The main fossil is a steinkern (internal mold) with the shell material dissolved. I think the polychaetes grew on the inside of the shell so we are seeing them from underneath where they attach to the shell. The same may be true of the bryozoans which is why you can see the hollow interior of each zooid. I'm not sure of the ID of the steinkern. People have suggested a nautiloid and I can see some resemblance but the division into camerae is not complete. I suspect it might actually be something else. Don 1 Link to comment Share on other sites More sharing options...
ynot Posted February 27, 2019 Share Posted February 27, 2019 Cracks can propagate into 3d suado cubic structures. Oxidation can occur along parts of the cracks while leaving other portions unoxidized. Oxidation will also occur where there is water flow through the rock/crack, and can be quite far from the surface, which are exposed when the rock is broken open. 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Dave pom Allen Posted February 27, 2019 Share Posted February 27, 2019 what you have is an internal mould of a type of limpet latiidae these are from Pliocene north isl nz. size from 20mm-100mm 3 Link to comment Share on other sites More sharing options...
agatex Posted February 27, 2019 Author Share Posted February 27, 2019 Just now, Dave (POM) Allen said: what you have is a type of limpet these are from Pliocene north isl nz. size from 20mm-100mm That's looks extremely promising, thanks! Link to comment Share on other sites More sharing options...
agatex Posted February 27, 2019 Author Share Posted February 27, 2019 18 minutes ago, Dave (POM) Allen said: what you have is an internal mould of a type of limpet latiidae these are from Pliocene north isl nz. size from 20mm-100mm @Dave (POM) Allen any idea what species you have there? Link to comment Share on other sites More sharing options...
Dave pom Allen Posted February 27, 2019 Share Posted February 27, 2019 1 hour ago, agatex said: @Dave (POM) Allen any idea what species you have there? no i haven't really looked into it. i mainly look for vertebrate fossils somebody here maybe able to help Link to comment Share on other sites More sharing options...
Coco Posted February 27, 2019 Share Posted February 27, 2019 Hi, 10 hours ago, agatex said: Folks I apologize. I didn't mean to offend or waste anyone's time. Using a coin for scale made sense in my mind. Apart from my introduction post, this is my first post here and I did spend ages trying to take good photos. I will measure the fossil and post the dimensions here. Congrats et thanks for sizes However, I let the more competent members answer. Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
agatex Posted February 27, 2019 Author Share Posted February 27, 2019 (edited) Folks, I think @Dave (POM) Allen has figured it out, it is Maoricrypta radiata which is a limpet like creature from the Late (and possibly Middle) Miocene period. They tended to stack on top of each other. Thanks to everyone to helped, especially @Dave (POM) Allen and those that identified the marking on it. Really great to be part of this community. Edited February 27, 2019 by agatex Link to comment Share on other sites More sharing options...
Packy Posted March 1, 2019 Share Posted March 1, 2019 That is awesome, I agree, looks like the creatures were growing inside, very nice. Packy 1 Link to comment Share on other sites More sharing options...
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