Mainefossils Posted February 24, 2021 Share Posted February 24, 2021 Fossil forum, Good morning. I recently found an interesting fossil invertebrate. It was found at the Leighton formation, Maine. I was thinking possible coral, but the segments on it were perplexing. Trilobite didn't seem to fit because of the size and the shape of the segments. Any help would be appreciated. Here are some pictures of it (the internal mold is on the left, external on the right): The more I learn, the more I find that I know nothing. Regards, Asher Link to comment Share on other sites More sharing options...
LabRatKing Posted February 24, 2021 Share Posted February 24, 2021 Looks like a crushed crinoid columnal to me given there is some cross sections near it. 1 Link to comment Share on other sites More sharing options...
I_gotta_rock Posted February 24, 2021 Share Posted February 24, 2021 2 hours ago, LabRatKing said: Looks like a crushed crinoid columnal to me given there is some cross sections near it. Agreed. I refuse to give up my childish wonder at the world. Link to comment Share on other sites More sharing options...
Mainefossils Posted February 24, 2021 Author Share Posted February 24, 2021 Thanks for your suggestions. I have thought that they could be crinoids, but I had a couple of questions. First, I found a second one that is practically identical in shape and form, and if the shape is due to compression, what are the chances that another would compress in the same fashion? Secondly, the upper left picture is an internal mold. In crinoids, the examples I've seen of the internal mold appear to be a simple cylinder, because of the stem lumen - is this segmented internal mold also typical of crinoids? Thanks again! The more I learn, the more I find that I know nothing. Regards, Asher Link to comment Share on other sites More sharing options...
Fossildude19 Posted February 24, 2021 Share Posted February 24, 2021 To me, it looks more like an orthocone cephalopod. Does the width narrow down as it comes up from the rock? 2 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
FossilDAWG Posted February 24, 2021 Share Posted February 24, 2021 It is a little odd, but I am inclined to agree with Tim that it is a partially flattened nautiloid. It is an internal/external mold, and a crinoid stem would not have had such a large interior to be filled with matrix. Don 1 2 Link to comment Share on other sites More sharing options...
Mainefossils Posted February 24, 2021 Author Share Posted February 24, 2021 1 hour ago, Fossildude19 said: To me, it looks more like an orthocone cephalopod. Does the width narrow down as it comes up from the rock? Yes, it does narrow. Thanks! 1 hour ago, FossilDAWG said: It is a little odd, but I am inclined to agree with Tim that it is a partially flattened nautiloid. It is an internal/external mold, and a crinoid stem would not have had such a large interior to be filled with matrix. Don Thanks for the information! The more I learn, the more I find that I know nothing. Regards, Asher Link to comment Share on other sites More sharing options...
Mainefossils Posted February 24, 2021 Author Share Posted February 24, 2021 Does anyone know a good resource for Maine orthocene nautiloids? Or a way I can identify it? The more I learn, the more I find that I know nothing. Regards, Asher Link to comment Share on other sites More sharing options...
.thumb.png.1c89bcbea88f1e4d0c75a8d5cee8738f.png)
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now