aangus Posted July 2, 2019 Share Posted July 2, 2019 Hello, I am a new user and I recently picked up this ammonite fossil at a local rock & fossil shop. I got it for $80, and it has not been worked on much, only one side has been mostly cleared of rock. I have tried to use various sources on the internet and galleries, but I am new to this and have not been able to identify this fossil myself. It is decently large, and about 8-9 inches across at its longest. There are lots of deep ridges in the shell, but each ridge as far as I can tell is uniform, with no protrusions. Unfortunately, I do not know the origin of this fossil, or the type of rock it is in, though it seems to be very soft and break easily. I can provide more information and/or photos as requested. Thanks! Link to comment Share on other sites More sharing options...
caldigger Posted July 2, 2019 Share Posted July 2, 2019 I'd put my money on a Mantelliceras sp. Link to comment Share on other sites More sharing options...
daves64 Posted July 2, 2019 Share Posted July 2, 2019 27 minutes ago, caldigger said: I'd put my money on a Mantelliceras sp. You have money? How'd you manage that? Accomplishing the impossible means only that the boss will add it to your regular duties. Link to comment Share on other sites More sharing options...
caldigger Posted July 2, 2019 Share Posted July 2, 2019 14 minutes ago, daves64 said: You have money? How'd you manage that? If you'll remember, I sold my third kidney last month. Link to comment Share on other sites More sharing options...
aangus Posted July 2, 2019 Author Share Posted July 2, 2019 Oh yeah @caldigger it looks a lot like other pictures of Mantelliceras online. Thanks for the suggestion! Link to comment Share on other sites More sharing options...
Natalie81 Posted July 2, 2019 Share Posted July 2, 2019 +1 for Mantelliceras Link to comment Share on other sites More sharing options...
Manticocerasman Posted July 2, 2019 Share Posted July 2, 2019 Do you have pictures of the keel? there should be 2 dots on the ribs of the keel to be a Mantelliceras. If there are none, I would say Calycoceras. 1 growing old is mandatory but growing up is optional. Link to comment Share on other sites More sharing options...
aangus Posted July 3, 2019 Author Share Posted July 3, 2019 @Manticocerasman I'm sorry, I'm pretty new to this and I don't know where the 'keel' of the ammonite is, could you explain? Link to comment Share on other sites More sharing options...
Manticocerasman Posted July 3, 2019 Share Posted July 3, 2019 58 minutes ago, aangus said: @Manticocerasman I'm sorry, I'm pretty new to this and I don't know where the 'keel' of the ammonite is, could you explain? sure although Keel it not the correct term for those kind of ammonites but it is commonly used to describe the back of an ammonite. there is a whole terminology of names of parts of the shell of cephalopods. actualy I should have used the term "venter" I can post a few pictures with the terminology on ammonite shells if you are interested I took a picture of one of the Manteliceras from my collection, here you can see the dots on the ammonite that I mentioned: growing old is mandatory but growing up is optional. Link to comment Share on other sites More sharing options...
FossilDAWG Posted July 3, 2019 Share Posted July 3, 2019 It would be quite informative if the nodes are present. However if they are not, it could be because of how the specimen was prepped. I think most or all of the original surface has been abraded away. Don Link to comment Share on other sites More sharing options...
aangus Posted July 3, 2019 Author Share Posted July 3, 2019 4 minutes ago, FossilDAWG said: It would be quite informative if the nodes are present. However if they are not, it could be because of how the specimen was prepped. I think most or all of the original surface has been abraded away. Don On 7/2/2019 at 12:58 AM, Manticocerasman said: Do you have pictures of the keel? there should be 2 dots on the ribs of the keel to be a Mantelliceras. If there are none, I would say Calycoceras. I see, thanks @Manticocerasman for explaining what the keel is. I looked at it from multiple different angles and couldn't find anything that looks like nodes or dots, but as was noted by FossilDAWG there are multiple other spots on this fossil that look like places where chips have been removed and surfaces have been worn down. Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted July 3, 2019 Share Posted July 3, 2019 30 minutes ago, Manticocerasman said: I can post a few pictures with the terminology on ammonite shells if you are interested Unless it's already posted elsewhere on the forum, it can't hurt. I'm interested too. Mark. Fossil hunting is easy -- they don't run away when you shoot at them! Link to comment Share on other sites More sharing options...
Manticocerasman Posted July 4, 2019 Share Posted July 4, 2019 7 hours ago, Mark Kmiecik said: Unless it's already posted elsewhere on the forum, it can't hurt. I'm interested too. al credits to 'the paleontological association" ( those are pictures from "Fossils of the gault clay" ) on this terminology on ammonites: 4 growing old is mandatory but growing up is optional. Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted July 4, 2019 Share Posted July 4, 2019 2 minutes ago, Manticocerasman said: al credits to 'the paleontological association" ( those are pictures from "Fossils of the gault clay" ) on this terminology on ammonites: Thank you. Mark. Fossil hunting is easy -- they don't run away when you shoot at them! Link to comment Share on other sites More sharing options...
aangus Posted July 4, 2019 Author Share Posted July 4, 2019 16 hours ago, Manticocerasman said: al credits to 'the paleontological association" ( those are pictures from "Fossils of the gault clay" ) on this terminology on ammonites: Yes thank you, as a newbie to fossils this helps! Link to comment Share on other sites More sharing options...
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